sync_clear_bit     18 arch/arm/include/asm/sync_bitops.h #define sync_clear_bit(nr, p)		_clear_bit(nr, p)
sync_clear_bit     19 arch/arm64/include/asm/sync_bitops.h #define sync_clear_bit(nr, p)			clear_bit(nr, p)
sync_clear_bit     50 arch/x86/include/asm/sync_bitops.h static inline void sync_clear_bit(long nr, volatile unsigned long *addr)