From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx> 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@xxxxxxxxx Signed-off-by: Sudip Mukherjee <sudip.mukherjee@xxxxxxxxxxxxxxx> Cc: David Howells <dhowells@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/frv/include/asm/atomic.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff -puN arch/frv/include/asm/atomic.h~frv-add-atomic64_add_unless arch/frv/include/asm/atomic.h --- a/arch/frv/include/asm/atomic.h~frv-add-atomic64_add_unless +++ a/arch/frv/include/asm/atomic.h @@ -161,6 +161,22 @@ static __inline__ int __atomic_add_unles 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) \ { \ _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
