tools/include/asm-generic/bitops/atomic.h at v4.8-rc2 · tjh.dev/kernel

tjh.dev / kernel

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

kernel / tools / include / asm-generic / bitops / atomic.h

at v4.8-rc2 645 B view raw

 1#ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_
 2#define _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_
 3
 4#include <asm/types.h>
 5#include <asm/bitsperlong.h>
 6
 7static inline void set_bit(int nr, unsigned long *addr)
 8{
 9	addr[nr / __BITS_PER_LONG] |= 1UL << (nr % __BITS_PER_LONG);
10}
11
12static inline void clear_bit(int nr, unsigned long *addr)
13{
14	addr[nr / __BITS_PER_LONG] &= ~(1UL << (nr % __BITS_PER_LONG));
15}
16
17static __always_inline int test_bit(unsigned int nr, const unsigned long *addr)
18{
19	return ((1UL << (nr % __BITS_PER_LONG)) &
20		(((unsigned long *)addr)[nr / __BITS_PER_LONG])) != 0;
21}
22
23#endif /* _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_ */