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authorSudip Mukherjee <sudipm.mukherjee@gmail.com>2017-01-25 02:18:21 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-25 03:26:14 +0300
commit545d58f677b21401f6de1ac12c25cc109f903ace (patch)
treea8667e45522fac162779f5684121528d924eed5e
parentd51e9894d27492783fc6d1b489070b4ba66ce969 (diff)
downloadlinux-545d58f677b21401f6de1ac12c25cc109f903ace.tar.xz
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>
-rw-r--r--arch/frv/include/asm/atomic.h16
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) \
{ \