sync_change_bit    19 arch/arm/include/asm/sync_bitops.h #define sync_change_bit(nr, p)		_change_bit(nr, p)
sync_change_bit    20 arch/arm64/include/asm/sync_bitops.h #define sync_change_bit(nr, p)			change_bit(nr, p)
sync_change_bit    67 arch/x86/include/asm/sync_bitops.h static inline void sync_change_bit(long nr, volatile unsigned long *addr)