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Merge branch 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

Browse Source 
* 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (30 commits)
  gameport: use this_cpu_read instead of lookup
  x86: udelay: Use this_cpu_read to avoid address calculation
  x86: Use this_cpu_inc_return for nmi counter
  x86: Replace uses of current_cpu_data with this_cpu ops
  x86: Use this_cpu_ops to optimize code
  vmstat: User per cpu atomics to avoid interrupt disable / enable
  irq_work: Use per cpu atomics instead of regular atomics
  cpuops: Use cmpxchg for xchg to avoid lock semantics
  x86: this_cpu_cmpxchg and this_cpu_xchg operations
  percpu: Generic this_cpu_cmpxchg() and this_cpu_xchg support
  percpu,x86: relocate this_cpu_add_return() and friends
  connector: Use this_cpu operations
  xen: Use this_cpu_inc_return
  taskstats: Use this_cpu_ops
  random: Use this_cpu_inc_return
  fs: Use this_cpu_inc_return in buffer.c
  highmem: Use this_cpu_xx_return() operations
  vmstat: Use this_cpu_inc_return for vm statistics
  x86: Support for this_cpu_add, sub, dec, inc_return
  percpu: Generic support for this_cpu_add, sub, dec, inc_return
  ...

Fixed up conflicts: in arch/x86/kernel/{apic/nmi.c, apic/x2apic_uv_x.c, process.c}
as per Tejun.
This commit is contained in:
Linus Torvalds 2011-01-07 17:02:58 -08:00
commit 72eb6a7914
62 changed files with 703 additions and 275 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
MAINTAINERS
View File

@ -4653,6 +4653,16 @@ S: Maintained
F: crypto/pcrypt.c
F: include/crypto/pcrypt.h
PER-CPU MEMORY ALLOCATOR
M: Tejun Heo <tj@kernel.org>
M: Christoph Lameter <cl@linux-foundation.org>
L: linux-kernel@vger.kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu.git
S: Maintained
F: include/linux/percpu*.h
F: mm/percpu*.c
F: arch/*/include/asm/percpu.h
PER-TASK DELAY ACCOUNTING
M: Balbir Singh <balbir@linux.vnet.ibm.com>
S: Maintained

3
arch/x86/Kconfig.cpu
View File

@ -310,6 +310,9 @@ config X86_INTERNODE_CACHE_SHIFT
config X86_CMPXCHG
def_bool X86_64 || (X86_32 && !M386)
config CMPXCHG_LOCAL
def_bool X86_64 || (X86_32 && !M386)
config X86_L1_CACHE_SHIFT
int
default "7" if MPENTIUM4 || MPSC

2
arch/x86/include/asm/debugreg.h
View File

@ -94,7 +94,7 @@ static inline void hw_breakpoint_disable(void)
static inline int hw_breakpoint_active(void)
{
return __get_cpu_var(cpu_dr7) & DR_GLOBAL_ENABLE_MASK;
return __this_cpu_read(cpu_dr7) & DR_GLOBAL_ENABLE_MASK;
}
extern void aout_dump_debugregs(struct user *dump);

158
arch/x86/include/asm/percpu.h
View File

@ -229,6 +229,125 @@ do { \
} \
})
/*
* Add return operation
*/
#define percpu_add_return_op(var, val) \
({ \
typeof(var) paro_ret__ = val; \
switch (sizeof(var)) { \
case 1: \
asm("xaddb %0, "__percpu_arg(1) \
: "+q" (paro_ret__), "+m" (var) \
: : "memory"); \
break; \
case 2: \
asm("xaddw %0, "__percpu_arg(1) \
: "+r" (paro_ret__), "+m" (var) \
: : "memory"); \
break; \
case 4: \
asm("xaddl %0, "__percpu_arg(1) \
: "+r" (paro_ret__), "+m" (var) \
: : "memory"); \
break; \
case 8: \
asm("xaddq %0, "__percpu_arg(1) \
: "+re" (paro_ret__), "+m" (var) \
: : "memory"); \
break; \
default: __bad_percpu_size(); \
} \
paro_ret__ += val; \
paro_ret__; \
})
/*
* xchg is implemented using cmpxchg without a lock prefix. xchg is
* expensive due to the implied lock prefix. The processor cannot prefetch
* cachelines if xchg is used.
*/
#define percpu_xchg_op(var, nval) \
({ \
typeof(var) pxo_ret__; \
typeof(var) pxo_new__ = (nval); \
switch (sizeof(var)) { \
case 1: \
asm("\n1:mov "__percpu_arg(1)",%%al" \
"\n\tcmpxchgb %2, "__percpu_arg(1) \
"\n\tjnz 1b" \
: "=a" (pxo_ret__), "+m" (var) \
: "q" (pxo_new__) \
: "memory"); \
break; \
case 2: \
asm("\n1:mov "__percpu_arg(1)",%%ax" \
"\n\tcmpxchgw %2, "__percpu_arg(1) \
"\n\tjnz 1b" \
: "=a" (pxo_ret__), "+m" (var) \
: "r" (pxo_new__) \
: "memory"); \
break; \
case 4: \
asm("\n1:mov "__percpu_arg(1)",%%eax" \
"\n\tcmpxchgl %2, "__percpu_arg(1) \
"\n\tjnz 1b" \
: "=a" (pxo_ret__), "+m" (var) \
: "r" (pxo_new__) \
: "memory"); \
break; \
case 8: \
asm("\n1:mov "__percpu_arg(1)",%%rax" \
"\n\tcmpxchgq %2, "__percpu_arg(1) \
"\n\tjnz 1b" \
: "=a" (pxo_ret__), "+m" (var) \
: "r" (pxo_new__) \
: "memory"); \
break; \
default: __bad_percpu_size(); \
} \
pxo_ret__; \
})
/*
* cmpxchg has no such implied lock semantics as a result it is much
* more efficient for cpu local operations.
*/
#define percpu_cmpxchg_op(var, oval, nval) \
({ \
typeof(var) pco_ret__; \
typeof(var) pco_old__ = (oval); \
typeof(var) pco_new__ = (nval); \
switch (sizeof(var)) { \
case 1: \
asm("cmpxchgb %2, "__percpu_arg(1) \
: "=a" (pco_ret__), "+m" (var) \
: "q" (pco_new__), "0" (pco_old__) \
: "memory"); \
break; \
case 2: \
asm("cmpxchgw %2, "__percpu_arg(1) \
: "=a" (pco_ret__), "+m" (var) \
: "r" (pco_new__), "0" (pco_old__) \
: "memory"); \
break; \
case 4: \
asm("cmpxchgl %2, "__percpu_arg(1) \
: "=a" (pco_ret__), "+m" (var) \
: "r" (pco_new__), "0" (pco_old__) \
: "memory"); \
break; \
case 8: \
asm("cmpxchgq %2, "__percpu_arg(1) \
: "=a" (pco_ret__), "+m" (var) \
: "r" (pco_new__), "0" (pco_old__) \
: "memory"); \
break; \
default: __bad_percpu_size(); \
} \
pco_ret__; \
})
/*
* percpu_read() makes gcc load the percpu variable every time it is
* accessed while percpu_read_stable() allows the value to be cached.
@ -267,6 +386,12 @@ do { \
#define __this_cpu_xor_1(pcp, val) percpu_to_op("xor", (pcp), val)
#define __this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
#define __this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)
/*
* Generic fallback operations for __this_cpu_xchg_[1-4] are okay and much
* faster than an xchg with forced lock semantics.
*/
#define __this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
#define __this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
@ -286,6 +411,11 @@ do { \
#define this_cpu_xor_1(pcp, val) percpu_to_op("xor", (pcp), val)
#define this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
#define this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)
#define this_cpu_xchg_1(pcp, nval) percpu_xchg_op(pcp, nval)
#define this_cpu_xchg_2(pcp, nval) percpu_xchg_op(pcp, nval)
#define this_cpu_xchg_4(pcp, nval) percpu_xchg_op(pcp, nval)
#define this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
#define this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define irqsafe_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
@ -299,6 +429,31 @@ do { \
#define irqsafe_cpu_xor_1(pcp, val) percpu_to_op("xor", (pcp), val)
#define irqsafe_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
#define irqsafe_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)
#define irqsafe_cpu_xchg_1(pcp, nval) percpu_xchg_op(pcp, nval)
#define irqsafe_cpu_xchg_2(pcp, nval) percpu_xchg_op(pcp, nval)
#define irqsafe_cpu_xchg_4(pcp, nval) percpu_xchg_op(pcp, nval)
#define irqsafe_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
#define irqsafe_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#ifndef CONFIG_M386
#define __this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
#define __this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
#define __this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
#define __this_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define __this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define __this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define irqsafe_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define irqsafe_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define irqsafe_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#endif /* !CONFIG_M386 */
/*
* Per cpu atomic 64 bit operations are only available under 64 bit.
@ -311,6 +466,7 @@ do { \
#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define __this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
#define __this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
@ -318,12 +474,12 @@ do { \
#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
#define this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
#define irqsafe_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define irqsafe_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
#endif
/* This is not atomic against other CPUs -- CPU preemption needs to be off */

3
arch/x86/include/asm/processor.h
View File

@ -141,10 +141,9 @@ extern __u32 cpu_caps_set[NCAPINTS];
#ifdef CONFIG_SMP
DECLARE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info);
#define cpu_data(cpu) per_cpu(cpu_info, cpu)
#define current_cpu_data __get_cpu_var(cpu_info)
#else
#define cpu_info boot_cpu_data
#define cpu_data(cpu) boot_cpu_data
#define current_cpu_data boot_cpu_data
#endif
extern const struct seq_operations cpuinfo_op;

2
arch/x86/kernel/apic/apic.c
View File

@ -516,7 +516,7 @@ static void __cpuinit setup_APIC_timer(void)
{
struct clock_event_device *levt = &__get_cpu_var(lapic_events);
if (cpu_has(&current_cpu_data, X86_FEATURE_ARAT)) {
if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_ARAT)) {
lapic_clockevent.features &= ~CLOCK_EVT_FEAT_C3STOP;
/* Make LAPIC timer preferrable over percpu HPET */
lapic_clockevent.rating = 150;

4
arch/x86/kernel/apic/io_apic.c
View File

@ -2329,7 +2329,7 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
unsigned int irr;
struct irq_desc *desc;
struct irq_cfg *cfg;
irq = __get_cpu_var(vector_irq)[vector];
irq = __this_cpu_read(vector_irq[vector]);
if (irq == -1)
continue;
@ -2363,7 +2363,7 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
goto unlock;
}
__get_cpu_var(vector_irq)[vector] = -1;
__this_cpu_write(vector_irq[vector], -1);
unlock:
raw_spin_unlock(&desc->lock);
}

8
arch/x86/kernel/apic/x2apic_uv_x.c
View File

@ -120,8 +120,8 @@ static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
else if (!strcmp(oem_table_id, "UVX"))
uv_system_type = UV_X2APIC;
else if (!strcmp(oem_table_id, "UVH")) {
__get_cpu_var(x2apic_extra_bits) =
pnodeid << uvh_apicid.s.pnode_shift;
__this_cpu_write(x2apic_extra_bits,
pnodeid << uvh_apicid.s.pnode_shift);
uv_system_type = UV_NON_UNIQUE_APIC;
uv_set_apicid_hibit();
return 1;
@ -286,7 +286,7 @@ static unsigned int x2apic_get_apic_id(unsigned long x)
unsigned int id;
WARN_ON(preemptible() && num_online_cpus() > 1);
id = x | __get_cpu_var(x2apic_extra_bits);
id = x | __this_cpu_read(x2apic_extra_bits);
return id;
}
@ -378,7 +378,7 @@ struct apic __refdata apic_x2apic_uv_x = {
static __cpuinit void set_x2apic_extra_bits(int pnode)
{
__get_cpu_var(x2apic_extra_bits) = (pnode << 6);
__this_cpu_write(x2apic_extra_bits, (pnode << 6));
}
/*

2
arch/x86/kernel/cpu/amd.c
View File

@ -668,7 +668,7 @@ EXPORT_SYMBOL_GPL(amd_erratum_383);
bool cpu_has_amd_erratum(const int *erratum)
{
struct cpuinfo_x86 *cpu = &current_cpu_data;
struct cpuinfo_x86 *cpu = __this_cpu_ptr(&cpu_info);
int osvw_id = *erratum++;
u32 range;
u32 ms;

4
arch/x86/kernel/cpu/cpufreq/powernow-k8.c
View File

@ -521,7 +521,7 @@ static void check_supported_cpu(void *_rc)
*rc = -ENODEV;
if (current_cpu_data.x86_vendor != X86_VENDOR_AMD)
if (__this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_AMD)
return;
eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
@ -1377,7 +1377,7 @@ static int __devexit powernowk8_cpu_exit(struct cpufreq_policy *pol)
static void query_values_on_cpu(void *_err)
{
int *err = _err;
struct powernow_k8_data *data = __get_cpu_var(powernow_data);
struct powernow_k8_data *data = __this_cpu_read(powernow_data);
*err = query_current_values_with_pending_wait(data);
}

4
arch/x86/kernel/cpu/intel_cacheinfo.c
View File

@ -265,7 +265,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
line_size = l2.line_size;
lines_per_tag = l2.lines_per_tag;
/* cpu_data has errata corrections for K7 applied */
size_in_kb = current_cpu_data.x86_cache_size;
size_in_kb = __this_cpu_read(cpu_info.x86_cache_size);
break;
case 3:
if (!l3.val)
@ -287,7 +287,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
eax->split.type = types[leaf];
eax->split.level = levels[leaf];
eax->split.num_threads_sharing = 0;
eax->split.num_cores_on_die = current_cpu_data.x86_max_cores - 1;
eax->split.num_cores_on_die = __this_cpu_read(cpu_info.x86_max_cores) - 1;
if (assoc == 0xffff)

20
arch/x86/kernel/cpu/mcheck/mce.c
View File

@ -326,7 +326,7 @@ static void mce_panic(char *msg, struct mce *final, char *exp)
static int msr_to_offset(u32 msr)
{
unsigned bank = __get_cpu_var(injectm.bank);
unsigned bank = __this_cpu_read(injectm.bank);
if (msr == rip_msr)
return offsetof(struct mce, ip);
@ -346,7 +346,7 @@ static u64 mce_rdmsrl(u32 msr)
{
u64 v;
if (__get_cpu_var(injectm).finished) {
if (__this_cpu_read(injectm.finished)) {
int offset = msr_to_offset(msr);
if (offset < 0)
@ -369,7 +369,7 @@ static u64 mce_rdmsrl(u32 msr)
static void mce_wrmsrl(u32 msr, u64 v)
{
if (__get_cpu_var(injectm).finished) {
if (__this_cpu_read(injectm.finished)) {
int offset = msr_to_offset(msr);
if (offset >= 0)
@ -1159,7 +1159,7 @@ static void mce_start_timer(unsigned long data)
WARN_ON(smp_processor_id() != data);
if (mce_available(&current_cpu_data)) {
if (mce_available(__this_cpu_ptr(&cpu_info))) {
machine_check_poll(MCP_TIMESTAMP,
&__get_cpu_var(mce_poll_banks));
}
@ -1767,7 +1767,7 @@ static int mce_shutdown(struct sys_device *dev)
static int mce_resume(struct sys_device *dev)
{
__mcheck_cpu_init_generic();
__mcheck_cpu_init_vendor(&current_cpu_data);
__mcheck_cpu_init_vendor(__this_cpu_ptr(&cpu_info));
return 0;
}
@ -1775,7 +1775,7 @@ static int mce_resume(struct sys_device *dev)
static void mce_cpu_restart(void *data)
{
del_timer_sync(&__get_cpu_var(mce_timer));
if (!mce_available(&current_cpu_data))
if (!mce_available(__this_cpu_ptr(&cpu_info)))
return;
__mcheck_cpu_init_generic();
__mcheck_cpu_init_timer();
@ -1790,7 +1790,7 @@ static void mce_restart(void)
/* Toggle features for corrected errors */
static void mce_disable_ce(void *all)
{
if (!mce_available(&current_cpu_data))
if (!mce_available(__this_cpu_ptr(&cpu_info)))
return;
if (all)
del_timer_sync(&__get_cpu_var(mce_timer));
@ -1799,7 +1799,7 @@ static void mce_disable_ce(void *all)
static void mce_enable_ce(void *all)
{
if (!mce_available(&current_cpu_data))
if (!mce_available(__this_cpu_ptr(&cpu_info)))
return;
cmci_reenable();
cmci_recheck();
@ -2022,7 +2022,7 @@ static void __cpuinit mce_disable_cpu(void *h)
unsigned long action = *(unsigned long *)h;
int i;
if (!mce_available(&current_cpu_data))
if (!mce_available(__this_cpu_ptr(&cpu_info)))
return;
if (!(action & CPU_TASKS_FROZEN))
@ -2040,7 +2040,7 @@ static void __cpuinit mce_reenable_cpu(void *h)
unsigned long action = *(unsigned long *)h;
int i;
if (!mce_available(&current_cpu_data))
if (!mce_available(__this_cpu_ptr(&cpu_info)))
return;
if (!(action & CPU_TASKS_FROZEN))

2
arch/x86/kernel/cpu/mcheck/mce_intel.c
View File

@ -130,7 +130,7 @@ void cmci_recheck(void)
unsigned long flags;
int banks;
if (!mce_available(&current_cpu_data) || !cmci_supported(&banks))
if (!mce_available(__this_cpu_ptr(&cpu_info)) || !cmci_supported(&banks))
return;
local_irq_save(flags);
machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));

27
arch/x86/kernel/cpu/perf_event.c
View File

@ -997,8 +997,7 @@ x86_perf_event_set_period(struct perf_event *event)
static void x86_pmu_enable_event(struct perf_event *event)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
if (cpuc->enabled)
if (__this_cpu_read(cpu_hw_events.enabled))
__x86_pmu_enable_event(&event->hw,
ARCH_PERFMON_EVENTSEL_ENABLE);
}
@ -1272,7 +1271,7 @@ perf_event_nmi_handler(struct notifier_block *self,
break;
case DIE_NMIUNKNOWN:
this_nmi = percpu_read(irq_stat.__nmi_count);
if (this_nmi != __get_cpu_var(pmu_nmi).marked)
if (this_nmi != __this_cpu_read(pmu_nmi.marked))
/* let the kernel handle the unknown nmi */
return NOTIFY_DONE;
/*
@ -1296,8 +1295,8 @@ perf_event_nmi_handler(struct notifier_block *self,
this_nmi = percpu_read(irq_stat.__nmi_count);
if ((handled > 1) ||
/* the next nmi could be a back-to-back nmi */
((__get_cpu_var(pmu_nmi).marked == this_nmi) &&
(__get_cpu_var(pmu_nmi).handled > 1))) {
((__this_cpu_read(pmu_nmi.marked) == this_nmi) &&
(__this_cpu_read(pmu_nmi.handled) > 1))) {
/*
* We could have two subsequent back-to-back nmis: The
* first handles more than one counter, the 2nd
@ -1308,8 +1307,8 @@ perf_event_nmi_handler(struct notifier_block *self,
* handling more than one counter. We will mark the
* next (3rd) and then drop it if unhandled.
*/
__get_cpu_var(pmu_nmi).marked = this_nmi + 1;
__get_cpu_var(pmu_nmi).handled = handled;
__this_cpu_write(pmu_nmi.marked, this_nmi + 1);
__this_cpu_write(pmu_nmi.handled, handled);
}
return NOTIFY_STOP;
@ -1484,11 +1483,9 @@ static inline void x86_pmu_read(struct perf_event *event)
*/
static void x86_pmu_start_txn(struct pmu *pmu)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
perf_pmu_disable(pmu);
cpuc->group_flag |= PERF_EVENT_TXN;
cpuc->n_txn = 0;
__this_cpu_or(cpu_hw_events.group_flag, PERF_EVENT_TXN);
__this_cpu_write(cpu_hw_events.n_txn, 0);
}
/*
@ -1498,14 +1495,12 @@ static void x86_pmu_start_txn(struct pmu *pmu)
*/
static void x86_pmu_cancel_txn(struct pmu *pmu)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
cpuc->group_flag &= ~PERF_EVENT_TXN;
__this_cpu_and(cpu_hw_events.group_flag, ~PERF_EVENT_TXN);
/*
* Truncate the collected events.
*/
cpuc->n_added -= cpuc->n_txn;
cpuc->n_events -= cpuc->n_txn;
__this_cpu_sub(cpu_hw_events.n_added, __this_cpu_read(cpu_hw_events.n_txn));
__this_cpu_sub(cpu_hw_events.n_events, __this_cpu_read(cpu_hw_events.n_txn));
perf_pmu_enable(pmu);
}

4
arch/x86/kernel/cpu/perf_event_intel.c
View File

@ -649,7 +649,7 @@ static void intel_pmu_enable_event(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
if (unlikely(hwc->idx == X86_PMC_IDX_FIXED_BTS)) {
if (!__get_cpu_var(cpu_hw_events).enabled)
if (!__this_cpu_read(cpu_hw_events.enabled))
return;
intel_pmu_enable_bts(hwc->config);
@ -679,7 +679,7 @@ static int intel_pmu_save_and_restart(struct perf_event *event)
static void intel_pmu_reset(void)
{
struct debug_store *ds = __get_cpu_var(cpu_hw_events).ds;
struct debug_store *ds = __this_cpu_read(cpu_hw_events.ds);
unsigned long flags;
int idx;

6
arch/x86/kernel/ftrace.c
View File

@ -170,9 +170,9 @@ static void ftrace_mod_code(void)
void ftrace_nmi_enter(void)
{
__get_cpu_var(save_modifying_code) = modifying_code;
__this_cpu_write(save_modifying_code, modifying_code);
if (!__get_cpu_var(save_modifying_code))
if (!__this_cpu_read(save_modifying_code))
return;
if (atomic_inc_return(&nmi_running) & MOD_CODE_WRITE_FLAG) {
@ -186,7 +186,7 @@ void ftrace_nmi_enter(void)
void ftrace_nmi_exit(void)
{
if (!__get_cpu_var(save_modifying_code))
if (!__this_cpu_read(save_modifying_code))
return;
/* Finish all executions before clearing nmi_running */

12
arch/x86/kernel/hw_breakpoint.c
View File

@ -122,7 +122,7 @@ int arch_install_hw_breakpoint(struct perf_event *bp)
return -EBUSY;
set_debugreg(info->address, i);
__get_cpu_var(cpu_debugreg[i]) = info->address;
__this_cpu_write(cpu_debugreg[i], info->address);
dr7 = &__get_cpu_var(cpu_dr7);
*dr7 |= encode_dr7(i, info->len, info->type);
@ -397,12 +397,12 @@ void flush_ptrace_hw_breakpoint(struct task_struct *tsk)
void hw_breakpoint_restore(void)
{
set_debugreg(__get_cpu_var(cpu_debugreg[0]), 0);
set_debugreg(__get_cpu_var(cpu_debugreg[1]), 1);
set_debugreg(__get_cpu_var(cpu_debugreg[2]), 2);
set_debugreg(__get_cpu_var(cpu_debugreg[3]), 3);
set_debugreg(__this_cpu_read(cpu_debugreg[0]), 0);
set_debugreg(__this_cpu_read(cpu_debugreg[1]), 1);
set_debugreg(__this_cpu_read(cpu_debugreg[2]), 2);
set_debugreg(__this_cpu_read(cpu_debugreg[3]), 3);
set_debugreg(current->thread.debugreg6, 6);
set_debugreg(__get_cpu_var(cpu_dr7), 7);
set_debugreg(__this_cpu_read(cpu_dr7), 7);
}
EXPORT_SYMBOL_GPL(hw_breakpoint_restore);

6
arch/x86/kernel/irq.c
View File

@ -234,7 +234,7 @@ unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
exit_idle();
irq_enter();
irq = __get_cpu_var(vector_irq)[vector];
irq = __this_cpu_read(vector_irq[vector]);
if (!handle_irq(irq, regs)) {
ack_APIC_irq();
@ -350,12 +350,12 @@ void fixup_irqs(void)
for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
unsigned int irr;
if (__get_cpu_var(vector_irq)[vector] < 0)
if (__this_cpu_read(vector_irq[vector]) < 0)
continue;
irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
if (irr & (1 << (vector % 32))) {
irq = __get_cpu_var(vector_irq)[vector];
irq = __this_cpu_read(vector_irq[vector]);
data = irq_get_irq_data(irq);
raw_spin_lock(&desc->lock);

4
arch/x86/kernel/irq_32.c
View File

@ -79,7 +79,7 @@ execute_on_irq_stack(int overflow, struct irq_desc *desc, int irq)
u32 *isp, arg1, arg2;
curctx = (union irq_ctx *) current_thread_info();
irqctx = __get_cpu_var(hardirq_ctx);
irqctx = __this_cpu_read(hardirq_ctx);
/*
* this is where we switch to the IRQ stack. However, if we are
@ -166,7 +166,7 @@ asmlinkage void do_softirq(void)
if (local_softirq_pending()) {
curctx = current_thread_info();
irqctx = __get_cpu_var(softirq_ctx);
irqctx = __this_cpu_read(softirq_ctx);
irqctx->tinfo.task = curctx->task;
irqctx->tinfo.previous_esp = current_stack_pointer;

14
arch/x86/kernel/kprobes.c
View File

@ -403,7 +403,7 @@ static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
{
__get_cpu_var(current_kprobe) = kcb->prev_kprobe.kp;
__this_cpu_write(current_kprobe, kcb->prev_kprobe.kp);
kcb->kprobe_status = kcb->prev_kprobe.status;
kcb->kprobe_old_flags = kcb->prev_kprobe.old_flags;
kcb->kprobe_saved_flags = kcb->prev_kprobe.saved_flags;
@ -412,7 +412,7 @@ static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
struct kprobe_ctlblk *kcb)
{
__get_cpu_var(current_kprobe) = p;
__this_cpu_write(current_kprobe, p);
kcb->kprobe_saved_flags = kcb->kprobe_old_flags
= (regs->flags & (X86_EFLAGS_TF | X86_EFLAGS_IF));
if (is_IF_modifier(p->ainsn.insn))
@ -586,7 +586,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
preempt_enable_no_resched();
return 1;
} else if (kprobe_running()) {
p = __get_cpu_var(current_kprobe);
p = __this_cpu_read(current_kprobe);
if (p->break_handler && p->break_handler(p, regs)) {
setup_singlestep(p, regs, kcb, 0);
return 1;
@ -759,11 +759,11 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
orig_ret_address = (unsigned long)ri->ret_addr;
if (ri->rp && ri->rp->handler) {
__get_cpu_var(current_kprobe) = &ri->rp->kp;
__this_cpu_write(current_kprobe, &ri->rp->kp);
get_kprobe_ctlblk()->kprobe_status = KPROBE_HIT_ACTIVE;
ri->ret_addr = correct_ret_addr;
ri->rp->handler(ri, regs);
__get_cpu_var(current_kprobe) = NULL;
__this_cpu_write(current_kprobe, NULL);
}
recycle_rp_inst(ri, &empty_rp);
@ -1202,10 +1202,10 @@ static void __kprobes optimized_callback(struct optimized_kprobe *op,
regs->ip = (unsigned long)op->kp.addr + INT3_SIZE;
regs->orig_ax = ~0UL;
__get_cpu_var(current_kprobe) = &op->kp;
__this_cpu_write(current_kprobe, &op->kp);
kcb->kprobe_status = KPROBE_HIT_ACTIVE;
opt_pre_handler(&op->kp, regs);
__get_cpu_var(current_kprobe) = NULL;
__this_cpu_write(current_kprobe, NULL);
}
preempt_enable_no_resched();
}

4
arch/x86/kernel/process.c
View File

@ -446,7 +446,7 @@ void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
trace_power_start(POWER_CSTATE, (ax>>4)+1, smp_processor_id());
trace_cpu_idle((ax>>4)+1, smp_processor_id());
if (!need_resched()) {
if (cpu_has(&current_cpu_data, X86_FEATURE_CLFLUSH_MONITOR))
if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLUSH_MONITOR))
clflush((void *)&current_thread_info()->flags);
__monitor((void *)&current_thread_info()->flags, 0, 0);
@ -462,7 +462,7 @@ static void mwait_idle(void)
if (!need_resched()) {
trace_power_start(POWER_CSTATE, 1, smp_processor_id());
trace_cpu_idle(1, smp_processor_id());
if (cpu_has(&current_cpu_data, X86_FEATURE_CLFLUSH_MONITOR))
if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLUSH_MONITOR))
clflush((void *)&current_thread_info()->flags);
__monitor((void *)&current_thread_info()->flags, 0, 0);

14
arch/x86/kernel/smpboot.c
View File

@ -427,7 +427,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
cpumask_set_cpu(cpu, c->llc_shared_map);
if (current_cpu_data.x86_max_cores == 1) {
if (__this_cpu_read(cpu_info.x86_max_cores) == 1) {
cpumask_copy(cpu_core_mask(cpu), cpu_sibling_mask(cpu));
c->booted_cores = 1;
return;
@ -1089,7 +1089,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
preempt_disable();
smp_cpu_index_default();
current_cpu_data = boot_cpu_data;
memcpy(__this_cpu_ptr(&cpu_info), &boot_cpu_data, sizeof(cpu_info));
cpumask_copy(cpu_callin_mask, cpumask_of(0));
mb();
/*
@ -1383,7 +1383,7 @@ void play_dead_common(void)
mb();
/* Ack it */
__get_cpu_var(cpu_state) = CPU_DEAD;
__this_cpu_write(cpu_state, CPU_DEAD);
/*
* With physical CPU hotplug, we should halt the cpu
@ -1403,11 +1403,11 @@ static inline void mwait_play_dead(void)
int i;
void *mwait_ptr;
if (!cpu_has(&current_cpu_data, X86_FEATURE_MWAIT))
if (!cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_MWAIT))
return;
if (!cpu_has(&current_cpu_data, X86_FEATURE_CLFLSH))
if (!cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLSH))
return;
if (current_cpu_data.cpuid_level < CPUID_MWAIT_LEAF)
if (__this_cpu_read(cpu_info.cpuid_level) < CPUID_MWAIT_LEAF)
return;
eax = CPUID_MWAIT_LEAF;
@ -1458,7 +1458,7 @@ static inline void mwait_play_dead(void)
static inline void hlt_play_dead(void)
{
if (current_cpu_data.x86 >= 4)
if (__this_cpu_read(cpu_info.x86) >= 4)
wbinvd();
while (1) {

2
arch/x86/kernel/tsc.c
View File

@ -659,7 +659,7 @@ void restore_sched_clock_state(void)
local_irq_save(flags);
__get_cpu_var(cyc2ns_offset) = 0;
__this_cpu_write(cyc2ns_offset, 0);
offset = cyc2ns_suspend - sched_clock();
for_each_possible_cpu(cpu)

8
arch/x86/kvm/x86.c
View File

@ -976,7 +976,7 @@ static inline u64 nsec_to_cycles(u64 nsec)
if (kvm_tsc_changes_freq())
printk_once(KERN_WARNING
"kvm: unreliable cycle conversion on adjustable rate TSC\n");
ret = nsec * __get_cpu_var(cpu_tsc_khz);
ret = nsec * __this_cpu_read(cpu_tsc_khz);
do_div(ret, USEC_PER_SEC);
return ret;
}
@ -1061,7 +1061,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v)
local_irq_save(flags);
kvm_get_msr(v, MSR_IA32_TSC, &tsc_timestamp);
kernel_ns = get_kernel_ns();
this_tsc_khz = __get_cpu_var(cpu_tsc_khz);
this_tsc_khz = __this_cpu_read(cpu_tsc_khz);
if (unlikely(this_tsc_khz == 0)) {
local_irq_restore(flags);
@ -4427,7 +4427,7 @@ EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
static void tsc_bad(void *info)
{
__get_cpu_var(cpu_tsc_khz) = 0;
__this_cpu_write(cpu_tsc_khz, 0);
}
static void tsc_khz_changed(void *data)
@ -4441,7 +4441,7 @@ static void tsc_khz_changed(void *data)
khz = cpufreq_quick_get(raw_smp_processor_id());
if (!khz)
khz = tsc_khz;
__get_cpu_var(cpu_tsc_khz) = khz;
__this_cpu_write(cpu_tsc_khz, khz);
}
static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,

2
arch/x86/lib/delay.c
View File

@ -121,7 +121,7 @@ inline void __const_udelay(unsigned long xloops)
asm("mull %%edx"
:"=d" (xloops), "=&a" (d0)
:"1" (xloops), "0"
(cpu_data(raw_smp_processor_id()).loops_per_jiffy * (HZ/4)));
(this_cpu_read(cpu_info.loops_per_jiffy) * (HZ/4)));
__delay(++xloops);
}

2
arch/x86/oprofile/nmi_int.c
View File

@ -143,7 +143,7 @@ static inline int has_mux(void)
inline int op_x86_phys_to_virt(int phys)
{
return __get_cpu_var(switch_index) + phys;
return __this_cpu_read(switch_index) + phys;
}
inline int op_x86_virt_to_phys(int virt)

8
arch/x86/oprofile/op_model_ppro.c
View File

@ -95,8 +95,8 @@ static void ppro_setup_ctrs(struct op_x86_model_spec const *model,
* counter width:
*/
if (!(eax.split.version_id == 0 &&
current_cpu_data.x86 == 6 &&
current_cpu_data.x86_model == 15)) {
__this_cpu_read(cpu_info.x86) == 6 &&
__this_cpu_read(cpu_info.x86_model) == 15)) {
if (counter_width < eax.split.bit_width)
counter_width = eax.split.bit_width;
@ -235,8 +235,8 @@ static void arch_perfmon_setup_counters(void)
eax.full = cpuid_eax(0xa);
/* Workaround for BIOS bugs in 6/15. Taken from perfmon2 */
if (eax.split.version_id == 0 && current_cpu_data.x86 == 6 &&
current_cpu_data.x86_model == 15) {
if (eax.split.version_id == 0 && __this_cpu_read(cpu_info.x86) == 6 &&
__this_cpu_read(cpu_info.x86_model) == 15) {
eax.split.version_id = 2;
eax.split.num_counters = 2;
eax.split.bit_width = 40;

4
arch/x86/xen/enlighten.c
View File

@ -574,8 +574,8 @@ static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
preempt_disable();
start = __get_cpu_var(idt_desc).address;
end = start + __get_cpu_var(idt_desc).size + 1;
start = __this_cpu_read(idt_desc.address);
end = start + __this_cpu_read(idt_desc.size) + 1;
xen_mc_flush();

2
arch/x86/xen/multicalls.h
View File

@ -22,7 +22,7 @@ static inline void xen_mc_batch(void)
unsigned long flags;
/* need to disable interrupts until this entry is complete */
local_irq_save(flags);
__get_cpu_var(xen_mc_irq_flags) = flags;
__this_cpu_write(xen_mc_irq_flags, flags);
}
static inline struct multicall_space xen_mc_entry(size_t args)

8
arch/x86/xen/spinlock.c
View File

@ -159,8 +159,8 @@ static inline struct xen_spinlock *spinning_lock(struct xen_spinlock *xl)
{
struct xen_spinlock *prev;
prev = __get_cpu_var(lock_spinners);
__get_cpu_var(lock_spinners) = xl;
prev = __this_cpu_read(lock_spinners);
__this_cpu_write(lock_spinners, xl);
wmb(); /* set lock of interest before count */
@ -179,14 +179,14 @@ static inline void unspinning_lock(struct xen_spinlock *xl, struct xen_spinlock
asm(LOCK_PREFIX " decw %0"
: "+m" (xl->spinners) : : "memory");
wmb(); /* decrement count before restoring lock */
__get_cpu_var(lock_spinners) = prev;
__this_cpu_write(lock_spinners, prev);
}
static noinline int xen_spin_lock_slow(struct arch_spinlock *lock, bool irq_enable)
{
struct xen_spinlock *xl = (struct xen_spinlock *)lock;
struct xen_spinlock *prev;
int irq = __get_cpu_var(lock_kicker_irq);
int irq = __this_cpu_read(lock_kicker_irq);
int ret;
u64 start;

8
arch/x86/xen/time.c
View File

@ -135,24 +135,24 @@ static void do_stolen_accounting(void)
/* Add the appropriate number of ticks of stolen time,
including any left-overs from last time. */
stolen = runnable + offline + __get_cpu_var(xen_residual_stolen);
stolen = runnable + offline + __this_cpu_read(xen_residual_stolen);
if (stolen < 0)
stolen = 0;
ticks = iter_div_u64_rem(stolen, NS_PER_TICK, &stolen);
__get_cpu_var(xen_residual_stolen) = stolen;
__this_cpu_write(xen_residual_stolen, stolen);
account_steal_ticks(ticks);
/* Add the appropriate number of ticks of blocked time,
including any left-overs from last time. */
blocked += __get_cpu_var(xen_residual_blocked);
blocked += __this_cpu_read(xen_residual_blocked);
if (blocked < 0)
blocked = 0;
ticks = iter_div_u64_rem(blocked, NS_PER_TICK, &blocked);
__get_cpu_var(xen_residual_blocked) = blocked;
__this_cpu_write(xen_residual_blocked, blocked);
account_idle_ticks(ticks);
}

6
drivers/acpi/processor_idle.c
View File

@ -746,7 +746,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
struct acpi_processor *pr;
struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
pr = __get_cpu_var(processors);
pr = __this_cpu_read(processors);
if (unlikely(!pr))
return 0;
@ -787,7 +787,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
s64 idle_time_ns;
s64 idle_time;
pr = __get_cpu_var(processors);
pr = __this_cpu_read(processors);
if (unlikely(!pr))
return 0;
@ -864,7 +864,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
s64 idle_time;
pr = __get_cpu_var(processors);
pr = __this_cpu_read(processors);
if (unlikely(!pr))
return 0;

2
drivers/char/random.c
View File

@ -626,7 +626,7 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
preempt_disable();
/* if over the trickle threshold, use only 1 in 4096 samples */
if (input_pool.entropy_count > trickle_thresh &&
(__get_cpu_var(trickle_count)++ & 0xfff))
((__this_cpu_inc_return(trickle_count) - 1) & 0xfff))
goto out;
sample.jiffies = jiffies;

5
drivers/connector/cn_proc.c
View File

@ -43,9 +43,10 @@ static DEFINE_PER_CPU(__u32, proc_event_counts) = { 0 };
static inline void get_seq(__u32 *ts, int *cpu)
{
*ts = get_cpu_var(proc_event_counts)++;
preempt_disable();
*ts = __this_cpu_inc_return(proc_event_counts) -1;
*cpu = smp_processor_id();
put_cpu_var(proc_event_counts);
preempt_enable();
}
void proc_fork_connector(struct task_struct *task)

2
drivers/cpuidle/cpuidle.c
View File

@ -49,7 +49,7 @@ static int __cpuidle_register_device(struct cpuidle_device *dev);
*/
static void cpuidle_idle_call(void)
{
struct cpuidle_device *dev = __get_cpu_var(cpuidle_devices);
struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
struct cpuidle_state *target_state;
int next_state;

2
drivers/input/gameport/gameport.c
View File

@ -121,7 +121,7 @@ static int gameport_measure_speed(struct gameport *gameport)
}
gameport_close(gameport);
return (cpu_data(raw_smp_processor_id()).loops_per_jiffy *
return (this_cpu_read(cpu_info.loops_per_jiffy) *
(unsigned long)HZ / (1000 / 50)) / (tx < 1 ? 1 : tx);
#else

2
drivers/s390/cio/cio.c
View File

@ -619,7 +619,7 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
s390_idle_check(regs, S390_lowcore.int_clock,
S390_lowcore.async_enter_timer);
irq_enter();
__get_cpu_var(s390_idle).nohz_delay = 1;
__this_cpu_write(s390_idle.nohz_delay, 1);
if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
/* Serve timer interrupts first. */
clock_comparator_work();

4
drivers/staging/lirc/lirc_serial.c
View File

@ -377,7 +377,7 @@ static int init_timing_params(unsigned int new_duty_cycle,
duty_cycle = new_duty_cycle;
freq = new_freq;
loops_per_sec = current_cpu_data.loops_per_jiffy;
loops_per_sec = __this_cpu_read(cpu.info.loops_per_jiffy);
loops_per_sec *= HZ;
/* How many clocks in a microsecond?, avoiding long long divide */
@ -398,7 +398,7 @@ static int init_timing_params(unsigned int new_duty_cycle,
dprintk("in init_timing_params, freq=%d, duty_cycle=%d, "
"clk/jiffy=%ld, pulse=%ld, space=%ld, "
"conv_us_to_clocks=%ld\n",
freq, duty_cycle, current_cpu_data.loops_per_jiffy,
freq, duty_cycle, __this_cpu_read(cpu_info.loops_per_jiffy),
pulse_width, space_width, conv_us_to_clocks);
return 0;
}

11
drivers/staging/speakup/fakekey.c
View File

@ -78,10 +78,10 @@ void speakup_fake_down_arrow(void)
/* don't change CPU */
preempt_disable();
__get_cpu_var(reporting_keystroke) = true;
__this_cpu_write(reporting_keystroke, true);
input_report_key(virt_keyboard, KEY_DOWN, PRESSED);
input_report_key(virt_keyboard, KEY_DOWN, RELEASED);
__get_cpu_var(reporting_keystroke) = false;
__this_cpu_write(reporting_keystroke, false);
/* reenable preemption */
preempt_enable();
@ -95,10 +95,5 @@ void speakup_fake_down_arrow(void)
*/
bool speakup_fake_key_pressed(void)
{
bool is_pressed;
is_pressed = get_cpu_var(reporting_keystroke);
put_cpu_var(reporting_keystroke);
return is_pressed;
return this_cpu_read(reporting_keystroke);
}

10
drivers/xen/events.c
View File

@ -355,7 +355,7 @@ static void unmask_evtchn(int port)
struct evtchn_unmask unmask = { .port = port };
(void)HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &unmask);
} else {
struct vcpu_info *vcpu_info = __get_cpu_var(xen_vcpu);
struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu);
sync_clear_bit(port, &s->evtchn_mask[0]);
@ -1101,7 +1101,7 @@ static void __xen_evtchn_do_upcall(void)
{
int cpu = get_cpu();
struct shared_info *s = HYPERVISOR_shared_info;
struct vcpu_info *vcpu_info = __get_cpu_var(xen_vcpu);
struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu);
unsigned count;
do {
@ -1109,7 +1109,7 @@ static void __xen_evtchn_do_upcall(void)
vcpu_info->evtchn_upcall_pending = 0;
if (__get_cpu_var(xed_nesting_count)++)
if (__this_cpu_inc_return(xed_nesting_count) - 1)
goto out;
#ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */
@ -1141,8 +1141,8 @@ static void __xen_evtchn_do_upcall(void)
BUG_ON(!irqs_disabled());
count = __get_cpu_var(xed_nesting_count);
__get_cpu_var(xed_nesting_count) = 0;
count = __this_cpu_read(xed_nesting_count);
__this_cpu_write(xed_nesting_count, 0);
} while (count != 1 || vcpu_info->evtchn_upcall_pending);
out:

37
fs/buffer.c
View File

@ -1270,12 +1270,10 @@ static inline void check_irqs_on(void)
static void bh_lru_install(struct buffer_head *bh)
{
struct buffer_head *evictee = NULL;
struct bh_lru *lru;
check_irqs_on();
bh_lru_lock();
lru = &__get_cpu_var(bh_lrus);
if (lru->bhs[0] != bh) {
if (__this_cpu_read(bh_lrus.bhs[0]) != bh) {
struct buffer_head *bhs[BH_LRU_SIZE];
int in;
int out = 0;
@ -1283,7 +1281,8 @@ static void bh_lru_install(struct buffer_head *bh)
get_bh(bh);
bhs[out++] = bh;
for (in = 0; in < BH_LRU_SIZE; in++) {
struct buffer_head *bh2 = lru->bhs[in];
struct buffer_head *bh2 =
__this_cpu_read(bh_lrus.bhs[in]);
if (bh2 == bh) {
__brelse(bh2);
@ -1298,7 +1297,7 @@ static void bh_lru_install(struct buffer_head *bh)
}
while (out < BH_LRU_SIZE)
bhs[out++] = NULL;
memcpy(lru->bhs, bhs, sizeof(bhs));
memcpy(__this_cpu_ptr(&bh_lrus.bhs), bhs, sizeof(bhs));
}
bh_lru_unlock();
@ -1313,23 +1312,22 @@ static struct buffer_head *
lookup_bh_lru(struct block_device *bdev, sector_t block, unsigned size)
{
struct buffer_head *ret = NULL;
struct bh_lru *lru;
unsigned int i;
check_irqs_on();
bh_lru_lock();
lru = &__get_cpu_var(bh_lrus);
for (i = 0; i < BH_LRU_SIZE; i++) {
struct buffer_head *bh = lru->bhs[i];
struct buffer_head *bh = __this_cpu_read(bh_lrus.bhs[i]);
if (bh && bh->b_bdev == bdev &&
bh->b_blocknr == block && bh->b_size == size) {
if (i) {
while (i) {
lru->bhs[i] = lru->bhs[i - 1];
__this_cpu_write(bh_lrus.bhs[i],
__this_cpu_read(bh_lrus.bhs[i - 1]));
i--;
}
lru->bhs[0] = bh;
__this_cpu_write(bh_lrus.bhs[0], bh);
}
get_bh(bh);
ret = bh;
@ -3203,22 +3201,23 @@ static void recalc_bh_state(void)
int i;
int tot = 0;
if (__get_cpu_var(bh_accounting).ratelimit++ < 4096)
if (__this_cpu_inc_return(bh_accounting.ratelimit) - 1 < 4096)
return;
__get_cpu_var(bh_accounting).ratelimit = 0;
__this_cpu_write(bh_accounting.ratelimit, 0);
for_each_online_cpu(i)
tot += per_cpu(bh_accounting, i).nr;
buffer_heads_over_limit = (tot > max_buffer_heads);
}
struct buffer_head *alloc_buffer_head(gfp_t gfp_flags)
{
struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags);
if (ret) {
INIT_LIST_HEAD(&ret->b_assoc_buffers);
get_cpu_var(bh_accounting).nr++;
preempt_disable();
__this_cpu_inc(bh_accounting.nr);
recalc_bh_state();
put_cpu_var(bh_accounting);
preempt_enable();
}
return ret;
}
@ -3228,9 +3227,10 @@ void free_buffer_head(struct buffer_head *bh)
{
BUG_ON(!list_empty(&bh->b_assoc_buffers));
kmem_cache_free(bh_cachep, bh);
get_cpu_var(bh_accounting).nr--;
preempt_disable();
__this_cpu_dec(bh_accounting.nr);
recalc_bh_state();
put_cpu_var(bh_accounting);
preempt_enable();
}
EXPORT_SYMBOL(free_buffer_head);
@ -3243,9 +3243,8 @@ static void buffer_exit_cpu(int cpu)
brelse(b->bhs[i]);
b->bhs[i] = NULL;
}
get_cpu_var(bh_accounting).nr += per_cpu(bh_accounting, cpu).nr;
this_cpu_add(bh_accounting.nr, per_cpu(bh_accounting, cpu).nr);
per_cpu(bh_accounting, cpu).nr = 0;
put_cpu_var(bh_accounting);
}
static int buffer_cpu_notify(struct notifier_block *self,

8
include/asm-generic/irq_regs.h
View File

@ -22,15 +22,15 @@ DECLARE_PER_CPU(struct pt_regs *, __irq_regs);
static inline struct pt_regs *get_irq_regs(void)
{
return __get_cpu_var(__irq_regs);
return __this_cpu_read(__irq_regs);
}
static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
{
struct pt_regs *old_regs, **pp_regs = &__get_cpu_var(__irq_regs);
struct pt_regs *old_regs;
old_regs = *pp_regs;
*pp_regs = new_regs;
old_regs = __this_cpu_read(__irq_regs);
__this_cpu_write(__irq_regs, new_regs);
return old_regs;
}

12
include/linux/elevator.h
View File

@ -195,15 +195,9 @@ enum {
/*
* io context count accounting
*/
#define elv_ioc_count_mod(name, __val) \
do { \
preempt_disable(); \
__get_cpu_var(name) += (__val); \
preempt_enable(); \
} while (0)
#define elv_ioc_count_inc(name) elv_ioc_count_mod(name, 1)
#define elv_ioc_count_dec(name) elv_ioc_count_mod(name, -1)
#define elv_ioc_count_mod(name, __val) this_cpu_add(name, __val)
#define elv_ioc_count_inc(name) this_cpu_inc(name)
#define elv_ioc_count_dec(name) this_cpu_dec(name)
#define elv_ioc_count_read(name) \
({ \

13
include/linux/highmem.h
View File

@ -81,7 +81,8 @@ DECLARE_PER_CPU(int, __kmap_atomic_idx);
static inline int kmap_atomic_idx_push(void)
{
int idx = __get_cpu_var(__kmap_atomic_idx)++;
int idx = __this_cpu_inc_return(__kmap_atomic_idx) - 1;
#ifdef CONFIG_DEBUG_HIGHMEM
WARN_ON_ONCE(in_irq() && !irqs_disabled());
BUG_ON(idx > KM_TYPE_NR);
@ -91,16 +92,18 @@ static inline int kmap_atomic_idx_push(void)
static inline int kmap_atomic_idx(void)
{
return __get_cpu_var(__kmap_atomic_idx) - 1;
return __this_cpu_read(__kmap_atomic_idx) - 1;
}
static inline int kmap_atomic_idx_pop(void)
static inline void kmap_atomic_idx_pop(void)
{
int idx = --__get_cpu_var(__kmap_atomic_idx);
#ifdef CONFIG_DEBUG_HIGHMEM
int idx = __this_cpu_dec_return(__kmap_atomic_idx);
BUG_ON(idx < 0);
#else
__this_cpu_dec(__kmap_atomic_idx);
#endif
return idx;
}
#endif

2
include/linux/kernel_stat.h
View File

@ -47,7 +47,7 @@ extern unsigned long long nr_context_switches(void);
#ifndef CONFIG_GENERIC_HARDIRQS
#define kstat_irqs_this_cpu(irq) \
(kstat_this_cpu.irqs[irq])
(this_cpu_read(kstat.irqs[irq])
struct irq_desc;

4
include/linux/kprobes.h
View File

@ -305,12 +305,12 @@ struct hlist_head * kretprobe_inst_table_head(struct task_struct *tsk);
/* kprobe_running() will just return the current_kprobe on this CPU */
static inline struct kprobe *kprobe_running(void)
{
return (__get_cpu_var(current_kprobe));
return (__this_cpu_read(current_kprobe));
}
static inline void reset_current_kprobe(void)
{
__get_cpu_var(current_kprobe) = NULL;
__this_cpu_write(current_kprobe, NULL);
}
static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)

205
include/linux/percpu.h
View File

@ -240,6 +240,21 @@ extern void __bad_size_call_parameter(void);
pscr_ret__; \
})
#define __pcpu_size_call_return2(stem, variable, ...) \
({ \
typeof(variable) pscr2_ret__; \
__verify_pcpu_ptr(&(variable)); \
switch(sizeof(variable)) { \
case 1: pscr2_ret__ = stem##1(variable, __VA_ARGS__); break; \
case 2: pscr2_ret__ = stem##2(variable, __VA_ARGS__); break; \
case 4: pscr2_ret__ = stem##4(variable, __VA_ARGS__); break; \
case 8: pscr2_ret__ = stem##8(variable, __VA_ARGS__); break; \
default: \
__bad_size_call_parameter(); break; \
} \
pscr2_ret__; \
})
#define __pcpu_size_call(stem, variable, ...) \
do { \
__verify_pcpu_ptr(&(variable)); \
@ -402,6 +417,89 @@ do { \
# define this_cpu_xor(pcp, val) __pcpu_size_call(this_cpu_or_, (pcp), (val))
#endif
#define _this_cpu_generic_add_return(pcp, val) \
({ \
typeof(pcp) ret__; \
preempt_disable(); \
__this_cpu_add(pcp, val); \
ret__ = __this_cpu_read(pcp); \
preempt_enable(); \
ret__; \
})
#ifndef this_cpu_add_return
# ifndef this_cpu_add_return_1
# define this_cpu_add_return_1(pcp, val) _this_cpu_generic_add_return(pcp, val)
# endif
# ifndef this_cpu_add_return_2
# define this_cpu_add_return_2(pcp, val) _this_cpu_generic_add_return(pcp, val)
# endif
# ifndef this_cpu_add_return_4
# define this_cpu_add_return_4(pcp, val) _this_cpu_generic_add_return(pcp, val)
# endif
# ifndef this_cpu_add_return_8
# define this_cpu_add_return_8(pcp, val) _this_cpu_generic_add_return(pcp, val)
# endif
# define this_cpu_add_return(pcp, val) __pcpu_size_call_return2(this_cpu_add_return_, pcp, val)
#endif
#define this_cpu_sub_return(pcp, val) this_cpu_add_return(pcp, -(val))
#define this_cpu_inc_return(pcp) this_cpu_add_return(pcp, 1)
#define this_cpu_dec_return(pcp) this_cpu_add_return(pcp, -1)
#define _this_cpu_generic_xchg(pcp, nval) \
({ typeof(pcp) ret__; \
preempt_disable(); \
ret__ = __this_cpu_read(pcp); \
__this_cpu_write(pcp, nval); \
preempt_enable(); \
ret__; \
})
#ifndef this_cpu_xchg
# ifndef this_cpu_xchg_1
# define this_cpu_xchg_1(pcp, nval) _this_cpu_generic_xchg(pcp, nval)
# endif
# ifndef this_cpu_xchg_2
# define this_cpu_xchg_2(pcp, nval) _this_cpu_generic_xchg(pcp, nval)
# endif
# ifndef this_cpu_xchg_4
# define this_cpu_xchg_4(pcp, nval) _this_cpu_generic_xchg(pcp, nval)
# endif
# ifndef this_cpu_xchg_8
# define this_cpu_xchg_8(pcp, nval) _this_cpu_generic_xchg(pcp, nval)
# endif
# define this_cpu_xchg(pcp, nval) \
__pcpu_size_call_return2(this_cpu_xchg_, (pcp), nval)
#endif
#define _this_cpu_generic_cmpxchg(pcp, oval, nval) \
({ typeof(pcp) ret__; \
preempt_disable(); \
ret__ = __this_cpu_read(pcp); \
if (ret__ == (oval)) \
__this_cpu_write(pcp, nval); \
preempt_enable(); \
ret__; \
})
#ifndef this_cpu_cmpxchg
# ifndef this_cpu_cmpxchg_1
# define this_cpu_cmpxchg_1(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# ifndef this_cpu_cmpxchg_2
# define this_cpu_cmpxchg_2(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# ifndef this_cpu_cmpxchg_4
# define this_cpu_cmpxchg_4(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# ifndef this_cpu_cmpxchg_8
# define this_cpu_cmpxchg_8(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# define this_cpu_cmpxchg(pcp, oval, nval) \
__pcpu_size_call_return2(this_cpu_cmpxchg_, pcp, oval, nval)
#endif
/*
* Generic percpu operations that do not require preemption handling.
* Either we do not care about races or the caller has the
@ -529,11 +627,87 @@ do { \
# define __this_cpu_xor(pcp, val) __pcpu_size_call(__this_cpu_xor_, (pcp), (val))
#endif
#define __this_cpu_generic_add_return(pcp, val) \
({ \
__this_cpu_add(pcp, val); \
__this_cpu_read(pcp); \
})
#ifndef __this_cpu_add_return
# ifndef __this_cpu_add_return_1
# define __this_cpu_add_return_1(pcp, val) __this_cpu_generic_add_return(pcp, val)
# endif
# ifndef __this_cpu_add_return_2
# define __this_cpu_add_return_2(pcp, val) __this_cpu_generic_add_return(pcp, val)
# endif
# ifndef __this_cpu_add_return_4
# define __this_cpu_add_return_4(pcp, val) __this_cpu_generic_add_return(pcp, val)
# endif
# ifndef __this_cpu_add_return_8
# define __this_cpu_add_return_8(pcp, val) __this_cpu_generic_add_return(pcp, val)
# endif
# define __this_cpu_add_return(pcp, val) __pcpu_size_call_return2(this_cpu_add_return_, pcp, val)
#endif
#define __this_cpu_sub_return(pcp, val) this_cpu_add_return(pcp, -(val))
#define __this_cpu_inc_return(pcp) this_cpu_add_return(pcp, 1)
#define __this_cpu_dec_return(pcp) this_cpu_add_return(pcp, -1)
#define __this_cpu_generic_xchg(pcp, nval) \
({ typeof(pcp) ret__; \
ret__ = __this_cpu_read(pcp); \
__this_cpu_write(pcp, nval); \
ret__; \
})
#ifndef __this_cpu_xchg
# ifndef __this_cpu_xchg_1
# define __this_cpu_xchg_1(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
# endif
# ifndef __this_cpu_xchg_2
# define __this_cpu_xchg_2(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
# endif
# ifndef __this_cpu_xchg_4
# define __this_cpu_xchg_4(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
# endif
# ifndef __this_cpu_xchg_8
# define __this_cpu_xchg_8(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
# endif
# define __this_cpu_xchg(pcp, nval) \
__pcpu_size_call_return2(__this_cpu_xchg_, (pcp), nval)
#endif
#define __this_cpu_generic_cmpxchg(pcp, oval, nval) \
({ \
typeof(pcp) ret__; \
ret__ = __this_cpu_read(pcp); \
if (ret__ == (oval)) \
__this_cpu_write(pcp, nval); \
ret__; \
})
#ifndef __this_cpu_cmpxchg
# ifndef __this_cpu_cmpxchg_1
# define __this_cpu_cmpxchg_1(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# ifndef __this_cpu_cmpxchg_2
# define __this_cpu_cmpxchg_2(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# ifndef __this_cpu_cmpxchg_4
# define __this_cpu_cmpxchg_4(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# ifndef __this_cpu_cmpxchg_8
# define __this_cpu_cmpxchg_8(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# define __this_cpu_cmpxchg(pcp, oval, nval) \
__pcpu_size_call_return2(__this_cpu_cmpxchg_, pcp, oval, nval)
#endif
/*
* IRQ safe versions of the per cpu RMW operations. Note that these operations
* are *not* safe against modification of the same variable from another
* processors (which one gets when using regular atomic operations)
. They are guaranteed to be atomic vs. local interrupts and
* They are guaranteed to be atomic vs. local interrupts and
* preemption only.
*/
#define irqsafe_cpu_generic_to_op(pcp, val, op) \
@ -620,4 +794,33 @@ do { \
# define irqsafe_cpu_xor(pcp, val) __pcpu_size_call(irqsafe_cpu_xor_, (val))
#endif
#define irqsafe_cpu_generic_cmpxchg(pcp, oval, nval) \
({ \
typeof(pcp) ret__; \
unsigned long flags; \
local_irq_save(flags); \
ret__ = __this_cpu_read(pcp); \
if (ret__ == (oval)) \
__this_cpu_write(pcp, nval); \
local_irq_restore(flags); \
ret__; \
})
#ifndef irqsafe_cpu_cmpxchg
# ifndef irqsafe_cpu_cmpxchg_1
# define irqsafe_cpu_cmpxchg_1(pcp, oval, nval) irqsafe_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# ifndef irqsafe_cpu_cmpxchg_2
# define irqsafe_cpu_cmpxchg_2(pcp, oval, nval) irqsafe_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# ifndef irqsafe_cpu_cmpxchg_4
# define irqsafe_cpu_cmpxchg_4(pcp, oval, nval) irqsafe_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# ifndef irqsafe_cpu_cmpxchg_8
# define irqsafe_cpu_cmpxchg_8(pcp, oval, nval) irqsafe_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
# define irqsafe_cpu_cmpxchg(pcp, oval, nval) \
__pcpu_size_call_return2(irqsafe_cpu_cmpxchg_, (pcp), oval, nval)
#endif
#endif /* __LINUX_PERCPU_H */

2
kernel/exit.c
View File

@ -69,7 +69,7 @@ static void __unhash_process(struct task_struct *p, bool group_dead)
list_del_rcu(&p->tasks);
list_del_init(&p->sibling);
__get_cpu_var(process_counts)--;
__this_cpu_dec(process_counts);
}
list_del_rcu(&p->thread_group);
}

2
kernel/fork.c
View File

@ -1285,7 +1285,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
attach_pid(p, PIDTYPE_SID, task_session(current));
list_add_tail(&p->sibling, &p->real_parent->children);
list_add_tail_rcu(&p->tasks, &init_task.tasks);
__get_cpu_var(process_counts)++;
__this_cpu_inc(process_counts);
}
attach_pid(p, PIDTYPE_PID, pid);
nr_threads++;

2
kernel/hrtimer.c
View File

@ -497,7 +497,7 @@ static inline int hrtimer_is_hres_enabled(void)
*/
static inline int hrtimer_hres_active(void)
{
return __get_cpu_var(hrtimer_bases).hres_active;
return __this_cpu_read(hrtimer_bases.hres_active);
}
/*

18
kernel/irq_work.c
View File

@ -77,21 +77,21 @@ void __weak arch_irq_work_raise(void)
*/
static void __irq_work_queue(struct irq_work *entry)
{
struct irq_work **head, *next;
struct irq_work *next;
head = &get_cpu_var(irq_work_list);
preempt_disable();
do {
next = *head;
next = __this_cpu_read(irq_work_list);
/* Can assign non-atomic because we keep the flags set. */
entry->next = next_flags(next, IRQ_WORK_FLAGS);
} while (cmpxchg(head, next, entry) != next);
} while (this_cpu_cmpxchg(irq_work_list, next, entry) != next);
/* The list was empty, raise self-interrupt to start processing. */
if (!irq_work_next(entry))
arch_irq_work_raise();
put_cpu_var(irq_work_list);
preempt_enable();
}
/*
@ -120,16 +120,16 @@ EXPORT_SYMBOL_GPL(irq_work_queue);
*/
void irq_work_run(void)
{
struct irq_work *list, **head;
struct irq_work *list;
head = &__get_cpu_var(irq_work_list);
if (*head == NULL)
if (this_cpu_read(irq_work_list) == NULL)
return;
BUG_ON(!in_irq());
BUG_ON(!irqs_disabled());
list = xchg(head, NULL);
list = this_cpu_xchg(irq_work_list, NULL);
while (list != NULL) {
struct irq_work *entry = list;

8
kernel/kprobes.c
View File

@ -317,12 +317,12 @@ void __kprobes free_optinsn_slot(kprobe_opcode_t * slot, int dirty)
/* We have preemption disabled.. so it is safe to use __ versions */
static inline void set_kprobe_instance(struct kprobe *kp)
{
__get_cpu_var(kprobe_instance) = kp;
__this_cpu_write(kprobe_instance, kp);
}
static inline void reset_kprobe_instance(void)
{
__get_cpu_var(kprobe_instance) = NULL;
__this_cpu_write(kprobe_instance, NULL);
}
/*
@ -965,7 +965,7 @@ static void __kprobes aggr_post_handler(struct kprobe *p, struct pt_regs *regs,
static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs,
int trapnr)
{
struct kprobe *cur = __get_cpu_var(kprobe_instance);
struct kprobe *cur = __this_cpu_read(kprobe_instance);
/*
* if we faulted "during" the execution of a user specified
@ -980,7 +980,7 @@ static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs,
static int __kprobes aggr_break_handler(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe *cur = __get_cpu_var(kprobe_instance);
struct kprobe *cur = __this_cpu_read(kprobe_instance);
int ret = 0;
if (cur && cur->break_handler) {

4
kernel/rcutree.c
View File

@ -364,8 +364,8 @@ void rcu_irq_exit(void)
WARN_ON_ONCE(rdtp->dynticks & 0x1);
/* If the interrupt queued a callback, get out of dyntick mode. */
if (__get_cpu_var(rcu_sched_data).nxtlist ||
__get_cpu_var(rcu_bh_data).nxtlist)
if (__this_cpu_read(rcu_sched_data.nxtlist) ||
__this_cpu_read(rcu_bh_data.nxtlist))
set_need_resched();
}

42
kernel/softirq.c
View File

@ -70,7 +70,7 @@ char *softirq_to_name[NR_SOFTIRQS] = {
static void wakeup_softirqd(void)
{
/* Interrupts are disabled: no need to stop preemption */
struct task_struct *tsk = __get_cpu_var(ksoftirqd);
struct task_struct *tsk = __this_cpu_read(ksoftirqd);
if (tsk && tsk->state != TASK_RUNNING)
wake_up_process(tsk);
@ -388,8 +388,8 @@ void __tasklet_schedule(struct tasklet_struct *t)
local_irq_save(flags);
t->next = NULL;
*__get_cpu_var(tasklet_vec).tail = t;
__get_cpu_var(tasklet_vec).tail = &(t->next);
*__this_cpu_read(tasklet_vec.tail) = t;
__this_cpu_write(tasklet_vec.tail, &(t->next));
raise_softirq_irqoff(TASKLET_SOFTIRQ);
local_irq_restore(flags);
}
@ -402,8 +402,8 @@ void __tasklet_hi_schedule(struct tasklet_struct *t)
local_irq_save(flags);
t->next = NULL;
*__get_cpu_var(tasklet_hi_vec).tail = t;
__get_cpu_var(tasklet_hi_vec).tail = &(t->next);
*__this_cpu_read(tasklet_hi_vec.tail) = t;
__this_cpu_write(tasklet_hi_vec.tail, &(t->next));
raise_softirq_irqoff(HI_SOFTIRQ);
local_irq_restore(flags);
}
@ -414,8 +414,8 @@ void __tasklet_hi_schedule_first(struct tasklet_struct *t)
{
BUG_ON(!irqs_disabled());
t->next = __get_cpu_var(tasklet_hi_vec).head;
__get_cpu_var(tasklet_hi_vec).head = t;
t->next = __this_cpu_read(tasklet_hi_vec.head);
__this_cpu_write(tasklet_hi_vec.head, t);
__raise_softirq_irqoff(HI_SOFTIRQ);
}
@ -426,9 +426,9 @@ static void tasklet_action(struct softirq_action *a)
struct tasklet_struct *list;
local_irq_disable();
list = __get_cpu_var(tasklet_vec).head;
__get_cpu_var(tasklet_vec).head = NULL;
__get_cpu_var(tasklet_vec).tail = &__get_cpu_var(tasklet_vec).head;
list = __this_cpu_read(tasklet_vec.head);
__this_cpu_write(tasklet_vec.head, NULL);
__this_cpu_write(tasklet_vec.tail, &__get_cpu_var(tasklet_vec).head);
local_irq_enable();
while (list) {
@ -449,8 +449,8 @@ static void tasklet_action(struct softirq_action *a)
local_irq_disable();
t->next = NULL;
*__get_cpu_var(tasklet_vec).tail = t;
__get_cpu_var(tasklet_vec).tail = &(t->next);
*__this_cpu_read(tasklet_vec.tail) = t;
__this_cpu_write(tasklet_vec.tail, &(t->next));
__raise_softirq_irqoff(TASKLET_SOFTIRQ);
local_irq_enable();
}
@ -461,9 +461,9 @@ static void tasklet_hi_action(struct softirq_action *a)
struct tasklet_struct *list;
local_irq_disable();
list = __get_cpu_var(tasklet_hi_vec).head;
__get_cpu_var(tasklet_hi_vec).head = NULL;
__get_cpu_var(tasklet_hi_vec).tail = &__get_cpu_var(tasklet_hi_vec).head;
list = __this_cpu_read(tasklet_hi_vec.head);
__this_cpu_write(tasklet_hi_vec.head, NULL);
__this_cpu_write(tasklet_hi_vec.tail, &__get_cpu_var(tasklet_hi_vec).head);
local_irq_enable();
while (list) {
@ -484,8 +484,8 @@ static void tasklet_hi_action(struct softirq_action *a)
local_irq_disable();
t->next = NULL;
*__get_cpu_var(tasklet_hi_vec).tail = t;
__get_cpu_var(tasklet_hi_vec).tail = &(t->next);
*__this_cpu_read(tasklet_hi_vec.tail) = t;
__this_cpu_write(tasklet_hi_vec.tail, &(t->next));
__raise_softirq_irqoff(HI_SOFTIRQ);
local_irq_enable();
}
@ -802,16 +802,16 @@ static void takeover_tasklets(unsigned int cpu)
/* Find end, append list for that CPU. */
if (&per_cpu(tasklet_vec, cpu).head != per_cpu(tasklet_vec, cpu).tail) {
*(__get_cpu_var(tasklet_vec).tail) = per_cpu(tasklet_vec, cpu).head;
__get_cpu_var(tasklet_vec).tail = per_cpu(tasklet_vec, cpu).tail;
*__this_cpu_read(tasklet_vec.tail) = per_cpu(tasklet_vec, cpu).head;
this_cpu_write(tasklet_vec.tail, per_cpu(tasklet_vec, cpu).tail);
per_cpu(tasklet_vec, cpu).head = NULL;
per_cpu(tasklet_vec, cpu).tail = &per_cpu(tasklet_vec, cpu).head;
}
raise_softirq_irqoff(TASKLET_SOFTIRQ);
if (&per_cpu(tasklet_hi_vec, cpu).head != per_cpu(tasklet_hi_vec, cpu).tail) {
*__get_cpu_var(tasklet_hi_vec).tail = per_cpu(tasklet_hi_vec, cpu).head;
__get_cpu_var(tasklet_hi_vec).tail = per_cpu(tasklet_hi_vec, cpu).tail;
*__this_cpu_read(tasklet_hi_vec.tail) = per_cpu(tasklet_hi_vec, cpu).head;
__this_cpu_write(tasklet_hi_vec.tail, per_cpu(tasklet_hi_vec, cpu).tail);
per_cpu(tasklet_hi_vec, cpu).head = NULL;
per_cpu(tasklet_hi_vec, cpu).tail = &per_cpu(tasklet_hi_vec, cpu).head;
}

5
kernel/taskstats.c
View File

@ -89,8 +89,7 @@ static int prepare_reply(struct genl_info *info, u8 cmd, struct sk_buff **skbp,
return -ENOMEM;
if (!info) {
int seq = get_cpu_var(taskstats_seqnum)++;
put_cpu_var(taskstats_seqnum);
int seq = this_cpu_inc_return(taskstats_seqnum) - 1;
reply = genlmsg_put(skb, 0, seq, &family, 0, cmd);
} else
@ -612,7 +611,7 @@ void taskstats_exit(struct task_struct *tsk, int group_dead)
fill_tgid_exit(tsk);
}
listeners = &__raw_get_cpu_var(listener_array);
listeners = __this_cpu_ptr(&listener_array);
if (list_empty(&listeners->list))
return;

2
kernel/time/tick-common.c
View File

@ -49,7 +49,7 @@ struct tick_device *tick_get_device(int cpu)
*/
int tick_is_oneshot_available(void)
{
struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev;
struct clock_event_device *dev = __this_cpu_read(tick_cpu_device.evtdev);
return dev && (dev->features & CLOCK_EVT_FEAT_ONESHOT);
}

4
kernel/time/tick-oneshot.c
View File

@ -95,7 +95,7 @@ int tick_dev_program_event(struct clock_event_device *dev, ktime_t expires,
*/
int tick_program_event(ktime_t expires, int force)
{
struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev;
struct clock_event_device *dev = __this_cpu_read(tick_cpu_device.evtdev);
return tick_dev_program_event(dev, expires, force);
}
@ -167,7 +167,7 @@ int tick_oneshot_mode_active(void)
int ret;
local_irq_save(flags);
ret = __get_cpu_var(tick_cpu_device).mode == TICKDEV_MODE_ONESHOT;
ret = __this_cpu_read(tick_cpu_device.mode) == TICKDEV_MODE_ONESHOT;
local_irq_restore(flags);
return ret;

36
kernel/watchdog.c
View File

@ -118,12 +118,12 @@ static void __touch_watchdog(void)
{
int this_cpu = smp_processor_id();
__get_cpu_var(watchdog_touch_ts) = get_timestamp(this_cpu);
__this_cpu_write(watchdog_touch_ts, get_timestamp(this_cpu));
}
void touch_softlockup_watchdog(void)
{
__raw_get_cpu_var(watchdog_touch_ts) = 0;
__this_cpu_write(watchdog_touch_ts, 0);
}
EXPORT_SYMBOL(touch_softlockup_watchdog);
@ -167,12 +167,12 @@ void touch_softlockup_watchdog_sync(void)
/* watchdog detector functions */
static int is_hardlockup(void)
{
unsigned long hrint = __get_cpu_var(hrtimer_interrupts);
unsigned long hrint = __this_cpu_read(hrtimer_interrupts);
if (__get_cpu_var(hrtimer_interrupts_saved) == hrint)
if (__this_cpu_read(hrtimer_interrupts_saved) == hrint)
return 1;
__get_cpu_var(hrtimer_interrupts_saved) = hrint;
__this_cpu_write(hrtimer_interrupts_saved, hrint);
return 0;
}
#endif
@ -205,8 +205,8 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
/* Ensure the watchdog never gets throttled */
event->hw.interrupts = 0;
if (__get_cpu_var(watchdog_nmi_touch) == true) {
__get_cpu_var(watchdog_nmi_touch) = false;
if (__this_cpu_read(watchdog_nmi_touch) == true) {
__this_cpu_write(watchdog_nmi_touch, false);
return;
}
@ -220,7 +220,7 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
int this_cpu = smp_processor_id();
/* only print hardlockups once */
if (__get_cpu_var(hard_watchdog_warn) == true)
if (__this_cpu_read(hard_watchdog_warn) == true)
return;
if (hardlockup_panic)
@ -228,16 +228,16 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
else
WARN(1, "Watchdog detected hard LOCKUP on cpu %d", this_cpu);
__get_cpu_var(hard_watchdog_warn) = true;
__this_cpu_write(hard_watchdog_warn, true);
return;
}
__get_cpu_var(hard_watchdog_warn) = false;
__this_cpu_write(hard_watchdog_warn, false);
return;
}
static void watchdog_interrupt_count(void)
{
__get_cpu_var(hrtimer_interrupts)++;
__this_cpu_inc(hrtimer_interrupts);
}
#else
static inline void watchdog_interrupt_count(void) { return; }
@ -246,7 +246,7 @@ static inline void watchdog_interrupt_count(void) { return; }
/* watchdog kicker functions */
static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
{
unsigned long touch_ts = __get_cpu_var(watchdog_touch_ts);
unsigned long touch_ts = __this_cpu_read(watchdog_touch_ts);
struct pt_regs *regs = get_irq_regs();
int duration;
@ -254,18 +254,18 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
watchdog_interrupt_count();
/* kick the softlockup detector */
wake_up_process(__get_cpu_var(softlockup_watchdog));
wake_up_process(__this_cpu_read(softlockup_watchdog));
/* .. and repeat */
hrtimer_forward_now(hrtimer, ns_to_ktime(get_sample_period()));
if (touch_ts == 0) {
if (unlikely(__get_cpu_var(softlockup_touch_sync))) {
if (unlikely(__this_cpu_read(softlockup_touch_sync))) {
/*
* If the time stamp was touched atomically
* make sure the scheduler tick is up to date.
*/
__get_cpu_var(softlockup_touch_sync) = false;
__this_cpu_write(softlockup_touch_sync, false);
sched_clock_tick();
}
__touch_watchdog();
@ -281,7 +281,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
duration = is_softlockup(touch_ts);
if (unlikely(duration)) {
/* only warn once */
if (__get_cpu_var(soft_watchdog_warn) == true)
if (__this_cpu_read(soft_watchdog_warn) == true)
return HRTIMER_RESTART;
printk(KERN_ERR "BUG: soft lockup - CPU#%d stuck for %us! [%s:%d]\n",
@ -296,9 +296,9 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
if (softlockup_panic)
panic("softlockup: hung tasks");
__get_cpu_var(soft_watchdog_warn) = true;
__this_cpu_write(soft_watchdog_warn, true);
} else
__get_cpu_var(soft_watchdog_warn) = false;
__this_cpu_write(soft_watchdog_warn, false);
return HRTIMER_RESTART;
}

8
lib/percpu_counter.c
View File

@ -72,18 +72,16 @@ EXPORT_SYMBOL(percpu_counter_set);
void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch)
{
s64 count;
s32 *pcount;
preempt_disable();
pcount = this_cpu_ptr(fbc->counters);
count = *pcount + amount;
count = __this_cpu_read(*fbc->counters) + amount;
if (count >= batch || count <= -batch) {
spin_lock(&fbc->lock);
fbc->count += count;
*pcount = 0;
__this_cpu_write(*fbc->counters, 0);
spin_unlock(&fbc->lock);
} else {
*pcount = count;
__this_cpu_write(*fbc->counters, count);
}
preempt_enable();
}

8
mm/percpu.c
View File

@ -293,12 +293,8 @@ static void *pcpu_mem_alloc(size_t size)
if (size <= PAGE_SIZE)
return kzalloc(size, GFP_KERNEL);
else {
void *ptr = vmalloc(size);
if (ptr)
memset(ptr, 0, size);
return ptr;
}
else
return vzalloc(size);
}
/**

6
mm/slab.c
View File

@ -829,12 +829,12 @@ static void init_reap_node(int cpu)
static void next_reap_node(void)
{
int node = __get_cpu_var(slab_reap_node);
int node = __this_cpu_read(slab_reap_node);
node = next_node(node, node_online_map);
if (unlikely(node >= MAX_NUMNODES))
node = first_node(node_online_map);
__get_cpu_var(slab_reap_node) = node;
__this_cpu_write(slab_reap_node, node);
}
#else
@ -1012,7 +1012,7 @@ static void __drain_alien_cache(struct kmem_cache *cachep,
*/
static void reap_alien(struct kmem_cache *cachep, struct kmem_list3 *l3)
{
int node = __get_cpu_var(slab_reap_node);
int node = __this_cpu_read(slab_reap_node);
if (l3->alien) {
struct array_cache *ac = l3->alien[node];

149
mm/vmstat.c
View File

@ -167,35 +167,23 @@ static void refresh_zone_stat_thresholds(void)
void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
{
struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset);
s8 *p = pcp->vm_stat_diff + item;
struct per_cpu_pageset __percpu *pcp = zone->pageset;
s8 __percpu *p = pcp->vm_stat_diff + item;
long x;
long t;
x = delta + *p;
x = delta + __this_cpu_read(*p);
if (unlikely(x > pcp->stat_threshold || x < -pcp->stat_threshold)) {
t = __this_cpu_read(pcp->stat_threshold);
if (unlikely(x > t || x < -t)) {
zone_page_state_add(x, zone, item);
x = 0;
}
*p = x;
__this_cpu_write(*p, x);
}
EXPORT_SYMBOL(__mod_zone_page_state);
/*
* For an unknown interrupt state
*/
void mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
{
unsigned long flags;
local_irq_save(flags);
__mod_zone_page_state(zone, item, delta);
local_irq_restore(flags);
}
EXPORT_SYMBOL(mod_zone_page_state);
/*
* Optimized increment and decrement functions.
*
@ -221,16 +209,17 @@ EXPORT_SYMBOL(mod_zone_page_state);
*/
void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
{
struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset);
s8 *p = pcp->vm_stat_diff + item;
struct per_cpu_pageset __percpu *pcp = zone->pageset;
s8 __percpu *p = pcp->vm_stat_diff + item;
s8 v, t;
(*p)++;
v = __this_cpu_inc_return(*p);
t = __this_cpu_read(pcp->stat_threshold);
if (unlikely(v > t)) {
s8 overstep = t >> 1;
if (unlikely(*p > pcp->stat_threshold)) {
int overstep = pcp->stat_threshold / 2;
zone_page_state_add(*p + overstep, zone, item);
*p = -overstep;
zone_page_state_add(v + overstep, zone, item);
__this_cpu_write(*p, -overstep);
}
}
@ -242,16 +231,17 @@ EXPORT_SYMBOL(__inc_zone_page_state);
void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
{
struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset);
s8 *p = pcp->vm_stat_diff + item;
struct per_cpu_pageset __percpu *pcp = zone->pageset;
s8 __percpu *p = pcp->vm_stat_diff + item;
s8 v, t;
(*p)--;
v = __this_cpu_dec_return(*p);
t = __this_cpu_read(pcp->stat_threshold);
if (unlikely(v < - t)) {
s8 overstep = t >> 1;
if (unlikely(*p < - pcp->stat_threshold)) {
int overstep = pcp->stat_threshold / 2;
zone_page_state_add(*p - overstep, zone, item);
*p = overstep;
zone_page_state_add(v - overstep, zone, item);
__this_cpu_write(*p, overstep);
}
}
@ -261,6 +251,92 @@ void __dec_zone_page_state(struct page *page, enum zone_stat_item item)
}
EXPORT_SYMBOL(__dec_zone_page_state);
#ifdef CONFIG_CMPXCHG_LOCAL
/*
* If we have cmpxchg_local support then we do not need to incur the overhead
* that comes with local_irq_save/restore if we use this_cpu_cmpxchg.
*
* mod_state() modifies the zone counter state through atomic per cpu
* operations.
*
* Overstep mode specifies how overstep should handled:
* 0 No overstepping
* 1 Overstepping half of threshold
* -1 Overstepping minus half of threshold
*/
static inline void mod_state(struct zone *zone,
enum zone_stat_item item, int delta, int overstep_mode)
{
struct per_cpu_pageset __percpu *pcp = zone->pageset;
s8 __percpu *p = pcp->vm_stat_diff + item;
long o, n, t, z;
do {
z = 0; /* overflow to zone counters */
/*
* The fetching of the stat_threshold is racy. We may apply
* a counter threshold to the wrong the cpu if we get
* rescheduled while executing here. However, the following
* will apply the threshold again and therefore bring the
* counter under the threshold.
*/
t = this_cpu_read(pcp->stat_threshold);
o = this_cpu_read(*p);
n = delta + o;
if (n > t || n < -t) {
int os = overstep_mode * (t >> 1) ;
/* Overflow must be added to zone counters */
z = n + os;
n = -os;
}
} while (this_cpu_cmpxchg(*p, o, n) != o);
if (z)
zone_page_state_add(z, zone, item);
}
void mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
{
mod_state(zone, item, delta, 0);
}
EXPORT_SYMBOL(mod_zone_page_state);
void inc_zone_state(struct zone *zone, enum zone_stat_item item)
{
mod_state(zone, item, 1, 1);
}
void inc_zone_page_state(struct page *page, enum zone_stat_item item)
{
mod_state(page_zone(page), item, 1, 1);
}
EXPORT_SYMBOL(inc_zone_page_state);
void dec_zone_page_state(struct page *page, enum zone_stat_item item)
{
mod_state(page_zone(page), item, -1, -1);
}
EXPORT_SYMBOL(dec_zone_page_state);
#else
/*
* Use interrupt disable to serialize counter updates
*/
void mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
{
unsigned long flags;
local_irq_save(flags);
__mod_zone_page_state(zone, item, delta);
local_irq_restore(flags);
}
EXPORT_SYMBOL(mod_zone_page_state);
void inc_zone_state(struct zone *zone, enum zone_stat_item item)
{
unsigned long flags;
@ -291,6 +367,7 @@ void dec_zone_page_state(struct page *page, enum zone_stat_item item)
local_irq_restore(flags);
}
EXPORT_SYMBOL(dec_zone_page_state);
#endif
/*
* Update the zone counters for one cpu.