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| author | Sudip Mukherjee <sudipm.mukherjee@gmail.com> | 2017-01-24 15:18:21 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-01-24 16:26:14 -0800 |
| commit | 545d58f677b21401f6de1ac12c25cc109f903ace (patch) | |
| tree | a8667e45522fac162779f5684121528d924eed5e /arch/frv/include | |
| parent | d51e9894d27492783fc6d1b489070b4ba66ce969 (diff) | |
| download | lwn-545d58f677b21401f6de1ac12c25cc109f903ace.tar.gz lwn-545d58f677b21401f6de1ac12c25cc109f903ace.zip | |
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 <sudip.mukherjee@codethink.co.uk>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/frv/include')
| -rw-r--r-- | arch/frv/include/asm/atomic.h | 16 |
1 files changed, 16 insertions, 0 deletions
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) \ { \ |