From 545d58f677b21401f6de1ac12c25cc109f903ace Mon Sep 17 00:00:00 2001 From: Sudip Mukherjee Date: Tue, 24 Jan 2017 15:18:21 -0800 Subject: frv: add atomic64_add_unless() The build of frv allmodconfig was failing with the error: lib/atomic64_test.c:209:9: error: implicit declaration of function 'atomic64_add_unless' All the atomic64 operations were defined in frv, but atomic64_add_unless() was not done. Implement atomic64_add_unless() as done in other arches. Link: http://lkml.kernel.org/r/1484781236-6698-1-git-send-email-sudipm.mukherjee@gmail.com Signed-off-by: Sudip Mukherjee Cc: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/frv/include/asm/atomic.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'arch/frv/include') diff --git a/arch/frv/include/asm/atomic.h b/arch/frv/include/asm/atomic.h index 1c2a5e264fc7..994ed3d5ca08 100644 --- a/arch/frv/include/asm/atomic.h +++ b/arch/frv/include/asm/atomic.h @@ -161,6 +161,22 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u) return c; } +static inline int atomic64_add_unless(atomic64_t *v, long long i, long long u) +{ + long long c, old; + + c = atomic64_read(v); + for (;;) { + if (unlikely(c == u)) + break; + old = atomic64_cmpxchg(v, c, c + i); + if (likely(old == c)) + break; + c = old; + } + return c != u; +} + #define ATOMIC_OP(op) \ static inline int atomic_fetch_##op(int i, atomic_t *v) \ { \ -- cgit v1.2.3