arch_atomic64_sub
#define arch_atomic64_sub(_i, _v) arch_atomic64_add(-(s64)(_i), _v)
static __always_inline void arch_atomic64_sub(s64 i, atomic64_t *v)
static __always_inline void arch_atomic64_sub(s64 i, atomic64_t *v)
#define arch_atomic64_sub generic_atomic64_sub