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

   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
   6 static inline void set_bit(int nr, unsigned long *addr)
   7 {
   8         addr[nr / __BITS_PER_LONG] |= 1UL << (nr % __BITS_PER_LONG);
   9 }
  10
  11 static inline void clear_bit(int nr, unsigned long *addr)
  12 {
  13         addr[nr / __BITS_PER_LONG] &= ~(1UL << (nr % __BITS_PER_LONG));
  14 }
  15
  16 static __always_inline int test_bit(unsigned int nr, const unsigned long *addr)
  17 {
  18         return ((1UL << (nr % __BITS_PER_LONG)) &
  19                 (((unsigned long *)addr)[nr / __BITS_PER_LONG])) != 0;
  20 }
  21
  22 #endif /* _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_ */