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exit_thread: remove empty bodies 

Define HAVE_EXIT_THREAD for archs which want to do something in
exit_thread. For others, let's define exit_thread as an empty inline.

This is a cleanup before we change the prototype of exit_thread to
accept a task parameter.

[akpm@linux-foundation.org: fix mips]
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: David Howells <dhowells@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiri Slaby 2016-05-20 17:00:16 -07:00 committed by Linus Torvalds
parent 2ec656eb40
commit 5f56a5dfdb
36 changed files with 24 additions and 140 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/Kconfig
View File

@ -517,6 +517,11 @@ config HAVE_ARCH_MMAP_RND_BITS
- ARCH_MMAP_RND_BITS_MIN
- ARCH_MMAP_RND_BITS_MAX
config HAVE_EXIT_THREAD
bool
help
An architecture implements exit_thread.
config ARCH_MMAP_RND_BITS_MIN
int

8
arch/alpha/kernel/process.c
View File

@ -210,14 +210,6 @@ start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
}
EXPORT_SYMBOL(start_thread);
/*
* Free current thread data structures etc..
*/
void
exit_thread(void)
{
}
void
flush_thread(void)
{

7
arch/arc/kernel/process.c
View File

@ -183,13 +183,6 @@ void flush_thread(void)
{
}
/*
* Free any architecture-specific thread data structures, etc.
*/
void exit_thread(void)
{
}
int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
{
return 0;

1
arch/arm/Kconfig
View File

@ -50,6 +50,7 @@ config ARM
select HAVE_DMA_CONTIGUOUS if MMU
select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) && !CPU_ENDIAN_BE32 && MMU
select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
select HAVE_EXIT_THREAD
select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)

7
arch/arm64/kernel/process.c
View File

@ -200,13 +200,6 @@ void show_regs(struct pt_regs * regs)
__show_regs(regs);
}
/*
* Free current thread data structures etc..
*/
void exit_thread(void)
{
}
static void tls_thread_flush(void)
{
asm ("msr tpidr_el0, xzr");

1
arch/avr32/Kconfig
View File

@ -4,6 +4,7 @@ config AVR32
# that we usually don't need on AVR32.
select EXPERT
select HAVE_CLK
select HAVE_EXIT_THREAD
select HAVE_OPROFILE
select HAVE_KPROBES
select VIRT_TO_BUS

7
arch/blackfin/include/asm/processor.h
View File

@ -75,13 +75,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/*
* Free current thread data structures etc..
*/
static inline void exit_thread(void)
{
}
/*
* Return saved PC of a blocked thread.
*/

4
arch/c6x/kernel/process.c
View File

@ -82,10 +82,6 @@ void flush_thread(void)
{
}
void exit_thread(void)
{
}
/*
* Do necessary setup to start up a newly executed thread.
*/

1
arch/cris/Kconfig
View File

@ -59,6 +59,7 @@ config CRIS
select GENERIC_IOMAP
select MODULES_USE_ELF_RELA
select CLONE_BACKWARDS2
select HAVE_EXIT_THREAD if ETRAX_ARCH_V32
select OLD_SIGSUSPEND
select OLD_SIGACTION
select GPIOLIB

9
arch/cris/arch-v10/kernel/process.c
View File

@ -35,15 +35,6 @@ void default_idle(void)
local_irq_enable();
}
/*
* Free current thread data structures etc..
*/
void exit_thread(void)
{
/* Nothing needs to be done. */
}
/* if the watchdog is enabled, we can simply disable interrupts and go
* into an eternal loop, and the watchdog will reset the CPU after 0.1s
* if on the other hand the watchdog wasn't enabled, we just enable it and wait

7
arch/frv/include/asm/processor.h
View File

@ -96,13 +96,6 @@ extern asmlinkage void *restore_user_regs(const struct user_context *target, ...
#define release_segments(mm) do { } while (0)
#define forget_segments() do { } while (0)
/*
* Free current thread data structures etc..
*/
static inline void exit_thread(void)
{
}
/*
* Return saved PC of a blocked thread.
*/

7
arch/h8300/include/asm/processor.h
View File

@ -110,13 +110,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/*
* Free current thread data structures etc..
*/
static inline void exit_thread(void)
{
}
/*
* Return saved PC of a blocked thread.
*/

7
arch/hexagon/kernel/process.c
View File

@ -136,13 +136,6 @@ void release_thread(struct task_struct *dead_task)
{
}
/*
* Free any architecture-specific thread data structures, etc.
*/
void exit_thread(void)
{
}
/*
* Some archs flush debug and FPU info here
*/

1
arch/ia64/Kconfig
View File

@ -18,6 +18,7 @@ config IA64
select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
select HAVE_UNSTABLE_SCHED_CLOCK
select HAVE_EXIT_THREAD
select HAVE_IDE
select HAVE_OPROFILE
select HAVE_KPROBES

9
arch/m32r/kernel/process.c
View File

@ -101,15 +101,6 @@ void show_regs(struct pt_regs * regs)
#endif
}
/*
* Free current thread data structures etc..
*/
void exit_thread(void)
{
/* Nothing to do. */
DPRINTK("pid = %d\n", current->pid);
}
void flush_thread(void)
{
DPRINTK("pid = %d\n", current->pid);

7
arch/m68k/include/asm/processor.h
View File

@ -153,13 +153,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/*
* Free current thread data structures etc..
*/
static inline void exit_thread(void)
{
}
extern unsigned long thread_saved_pc(struct task_struct *tsk);
unsigned long get_wchan(struct task_struct *p);

1
arch/metag/Kconfig
View File

@ -11,6 +11,7 @@ config METAG
select HAVE_DEBUG_KMEMLEAK
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_DYNAMIC_FTRACE
select HAVE_EXIT_THREAD
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FUNCTION_TRACER
select HAVE_KERNEL_BZIP2

2
arch/metag/include/asm/processor.h
View File

@ -134,8 +134,6 @@ static inline void release_thread(struct task_struct *dead_task)
#define copy_segments(tsk, mm) do { } while (0)
#define release_segments(mm) do { } while (0)
extern void exit_thread(void);
/*
* Return saved PC of a blocked thread.
*/

10
arch/microblaze/include/asm/processor.h
View File

@ -70,11 +70,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/* Free all resources held by a thread. */
static inline void exit_thread(void)
{
}
extern unsigned long thread_saved_pc(struct task_struct *t);
extern unsigned long get_wchan(struct task_struct *p);
@ -127,11 +122,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/* Free current thread data structures etc. */
static inline void exit_thread(void)
{
}
/* Return saved (kernel) PC of a blocked thread. */
# define thread_saved_pc(tsk) \
((tsk)->thread.regs ? (tsk)->thread.regs->r15 : 0)

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

@ -73,10 +73,6 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
regs->regs[29] = sp;
}
void exit_thread(void)
{
}
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
/*

1
arch/mn10300/Kconfig
View File

@ -1,5 +1,6 @@
config MN10300
def_bool y
select HAVE_EXIT_THREAD
select HAVE_OPROFILE
select HAVE_UID16
select GENERIC_IRQ_SHOW

5
arch/nios2/include/asm/processor.h
View File

@ -75,11 +75,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/* Free current thread data structures etc.. */
static inline void exit_thread(void)
{
}
/* Return saved PC of a blocked thread. */
#define thread_saved_pc(tsk) ((tsk)->thread.kregs->ea)

9
arch/openrisc/include/asm/processor.h
View File

@ -84,15 +84,6 @@ void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
void release_thread(struct task_struct *);
unsigned long get_wchan(struct task_struct *p);
/*
* Free current thread data structures etc..
*/
extern inline void exit_thread(void)
{
/* Nothing needs to be done. */
}
/*
* Return saved PC of a blocked thread. For now, this is the "user" PC
*/

7
arch/parisc/kernel/process.c
View File

@ -144,13 +144,6 @@ void machine_power_off(void)
void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL(pm_power_off);
/*
* Free current thread data structures etc..
*/
void exit_thread(void)
{
}
void flush_thread(void)
{
/* Only needs to handle fpu stuff or perf monitors.

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

@ -1329,10 +1329,6 @@ void show_regs(struct pt_regs * regs)
show_instructions(regs);
}
void exit_thread(void)
{
}
void flush_thread(void)
{
#ifdef CONFIG_HAVE_HW_BREAKPOINT

1
arch/s390/Kconfig
View File

@ -134,6 +134,7 @@ config S390
select HAVE_DMA_API_DEBUG
select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_EXIT_THREAD
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_TRACER

2
arch/score/kernel/process.c
View File

@ -56,8 +56,6 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
regs->regs[0] = sp;
}
void exit_thread(void) {}
/*
* When a process does an "exec", machine state like FPU and debug
* registers need to be reset. This is a hook function for that.

1
arch/sh/Kconfig
View File

@ -71,6 +71,7 @@ config SUPERH32
config SUPERH64
def_bool ARCH = "sh64"
select HAVE_EXIT_THREAD
select KALLSYMS
config ARCH_DEFCONFIG

7
arch/sh/kernel/process_32.c
View File

@ -76,13 +76,6 @@ void start_thread(struct pt_regs *regs, unsigned long new_pc,
}
EXPORT_SYMBOL(start_thread);
/*
* Free current thread data structures etc..
*/
void exit_thread(void)
{
}
void flush_thread(void)
{
struct task_struct *tsk = current;

1
arch/sparc/Kconfig
View File

@ -20,6 +20,7 @@ config SPARC
select HAVE_OPROFILE
select HAVE_ARCH_KGDB if !SMP || SPARC64
select HAVE_ARCH_TRACEHOOK
select HAVE_EXIT_THREAD
select SYSCTL_EXCEPTION_TRACE
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
select RTC_CLASS

1
arch/tile/Kconfig
View File

@ -3,6 +3,7 @@
config TILE
def_bool y
select HAVE_EXIT_THREAD
select HAVE_PERF_EVENTS
select USE_PMC if PERF_EVENTS
select HAVE_DMA_API_DEBUG

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

@ -103,10 +103,6 @@ void interrupt_end(void)
tracehook_notify_resume(regs);
}
void exit_thread(void)
{
}
int get_current_pid(void)
{
return task_pid_nr(current);

7
arch/unicore32/kernel/process.c
View File

@ -201,13 +201,6 @@ void show_regs(struct pt_regs *regs)
__backtrace();
}
/*
* Free current thread data structures etc..
*/
void exit_thread(void)
{
}
void flush_thread(void)
{
struct thread_info *thread = current_thread_info();

1
arch/x86/Kconfig
View File

@ -105,6 +105,7 @@ config X86
select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_EFFICIENT_UNALIGNED_ACCESS
select HAVE_EXIT_THREAD
select HAVE_FENTRY if X86_64
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FUNCTION_GRAPH_FP_TEST

1
arch/xtensa/Kconfig
View File

@ -14,6 +14,7 @@ config XTENSA
select GENERIC_PCI_IOMAP
select GENERIC_SCHED_CLOCK
select HAVE_DMA_API_DEBUG
select HAVE_EXIT_THREAD
select HAVE_FUNCTION_TRACER
select HAVE_FUTEX_CMPXCHG if !MMU
select HAVE_HW_BREAKPOINT if PERF_EVENTS

7
include/linux/sched.h
View File

@ -2769,7 +2769,14 @@ static inline int copy_thread_tls(
}
#endif
extern void flush_thread(void);
#ifdef CONFIG_HAVE_EXIT_THREAD
extern void exit_thread(void);
#else
static inline void exit_thread(void)
{
}
#endif
extern void exit_files(struct task_struct *);
extern void __cleanup_sighand(struct sighand_struct *);