ATOMIC64_SUB_AND_TES(9) Driver Basics ATOMIC64_SUB_AND_TES(9)NAMEatomic64_sub_and_test - subtract value from variable and test result
SYNOPSIS
int atomic64_sub_and_test(u64 delta, atomic64_t * ptr);
ARGUMENTS
delta
integer value to subtract
ptr
pointer to type atomic64_t
DESCRIPTION
Atomically subtracts delta from ptr and returns true if the result is
zero, or false for all other cases.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 ATOMIC64_SUB_AND_TES(9)