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linux/include/asm-generic/bitops/atomic.h
Mark Rutland 0f613bfa82 locking/atomic: treewide: use raw_atomic*_<op>()
Now that we have raw_atomic*_<op>() definitions, there's no need to use
arch_atomic*_<op>() definitions outside of the low-level atomic
definitions.

Move treewide users of arch_atomic*_<op>() over to the equivalent
raw_atomic*_<op>().

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230605070124.3741859-19-mark.rutland@arm.com
2023-06-05 09:57:20 +02:00

71 lines
1.6 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_BITOPS_ATOMIC_H_
#define _ASM_GENERIC_BITOPS_ATOMIC_H_
#include <linux/atomic.h>
#include <linux/compiler.h>
#include <asm/barrier.h>
/*
* Implementation of atomic bitops using atomic-fetch ops.
* See Documentation/atomic_bitops.txt for details.
*/
static __always_inline void
arch_set_bit(unsigned int nr, volatile unsigned long *p)
{
p += BIT_WORD(nr);
raw_atomic_long_or(BIT_MASK(nr), (atomic_long_t *)p);
}
static __always_inline void
arch_clear_bit(unsigned int nr, volatile unsigned long *p)
{
p += BIT_WORD(nr);
raw_atomic_long_andnot(BIT_MASK(nr), (atomic_long_t *)p);
}
static __always_inline void
arch_change_bit(unsigned int nr, volatile unsigned long *p)
{
p += BIT_WORD(nr);
raw_atomic_long_xor(BIT_MASK(nr), (atomic_long_t *)p);
}
static __always_inline int
arch_test_and_set_bit(unsigned int nr, volatile unsigned long *p)
{
long old;
unsigned long mask = BIT_MASK(nr);
p += BIT_WORD(nr);
old = raw_atomic_long_fetch_or(mask, (atomic_long_t *)p);
return !!(old & mask);
}
static __always_inline int
arch_test_and_clear_bit(unsigned int nr, volatile unsigned long *p)
{
long old;
unsigned long mask = BIT_MASK(nr);
p += BIT_WORD(nr);
old = raw_atomic_long_fetch_andnot(mask, (atomic_long_t *)p);
return !!(old & mask);
}
static __always_inline int
arch_test_and_change_bit(unsigned int nr, volatile unsigned long *p)
{
long old;
unsigned long mask = BIT_MASK(nr);
p += BIT_WORD(nr);
old = raw_atomic_long_fetch_xor(mask, (atomic_long_t *)p);
return !!(old & mask);
}
#include <asm-generic/bitops/instrumented-atomic.h>
#endif /* _ASM_GENERIC_BITOPS_ATOMIC_H */