All, I came across these atomic_inc_return_safe() & atomic_dec_return_safe() functions that hold the counters at safe values.
atomic_inc_return_safe() If the counter is already 0 it will not be incremented. If the counter is already at its maximum value returns -EINVAL without updating it. atomic_dec_return_safe() Decrement the counter. Return the resulting value, or -EINVAL These two routines are static and only used in rbd.c. Can these become part of atomic_t ops? thanks, -- Shuah
