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acc402fa5b
[ Upstream commit c35a824c31834d947fb99b0c608c1b9f922b4ba0 ] With UBSAN enabled and building with clang, there are occasionally warnings like WARNING: modpost: vmlinux.o(.text+0xc533ec): Section mismatch in reference from the function arch_atomic64_or() to the variable .init.data:numa_nodes_parsed The function arch_atomic64_or() references the variable __initdata numa_nodes_parsed. This is often because arch_atomic64_or lacks a __initdata annotation or the annotation of numa_nodes_parsed is wrong. for functions that end up not being inlined as intended but operating on __initdata variables. Mark these as __always_inline, along with the corresponding asm-generic wrappers. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20210108092024.4034860-1-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_GENERIC_BITOPS_ATOMIC_H_
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#define _ASM_GENERIC_BITOPS_ATOMIC_H_
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#include <linux/atomic.h>
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#include <linux/compiler.h>
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#include <asm/barrier.h>
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/*
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* Implementation of atomic bitops using atomic-fetch ops.
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* See Documentation/atomic_bitops.txt for details.
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*/
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static __always_inline void set_bit(unsigned int nr, volatile unsigned long *p)
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{
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p += BIT_WORD(nr);
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atomic_long_or(BIT_MASK(nr), (atomic_long_t *)p);
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}
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static __always_inline void clear_bit(unsigned int nr, volatile unsigned long *p)
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{
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p += BIT_WORD(nr);
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atomic_long_andnot(BIT_MASK(nr), (atomic_long_t *)p);
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}
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static __always_inline void change_bit(unsigned int nr, volatile unsigned long *p)
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{
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p += BIT_WORD(nr);
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atomic_long_xor(BIT_MASK(nr), (atomic_long_t *)p);
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}
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static inline int test_and_set_bit(unsigned int nr, volatile unsigned long *p)
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{
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long old;
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unsigned long mask = BIT_MASK(nr);
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p += BIT_WORD(nr);
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if (READ_ONCE(*p) & mask)
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return 1;
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old = atomic_long_fetch_or(mask, (atomic_long_t *)p);
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return !!(old & mask);
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}
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static inline int test_and_clear_bit(unsigned int nr, volatile unsigned long *p)
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{
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long old;
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unsigned long mask = BIT_MASK(nr);
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p += BIT_WORD(nr);
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if (!(READ_ONCE(*p) & mask))
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return 0;
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old = atomic_long_fetch_andnot(mask, (atomic_long_t *)p);
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return !!(old & mask);
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}
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static inline int test_and_change_bit(unsigned int nr, volatile unsigned long *p)
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{
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long old;
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unsigned long mask = BIT_MASK(nr);
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p += BIT_WORD(nr);
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old = atomic_long_fetch_xor(mask, (atomic_long_t *)p);
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return !!(old & mask);
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}
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#endif /* _ASM_GENERIC_BITOPS_ATOMIC_H */
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