+static __inline__ long atomic64_dec_if_positive(atomic64_t *v)
+{
+ long c, old, dec;
+ c = atomic64_read(v);
+ for (;;) {
+ dec = c - 1;
+ if (unlikely(dec < 0))
+ break;
+ old = atomic64_cmpxchg((v), c, dec);
+
This is based on s390 version and needed to get rid of
CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Cc: Tony Luck
Cc: Fenghua Yu
Cc: Ingo Molnar
Cc: Peter Zijlstra
Cc: linux-i...@vger.kernel.org
Cc: linux-ker...@vger.kernel.org
Signed-off-by: Vineet Gupta
---
arch/ia64/include/asm/atomic.h | 16
