From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx> Subject: frv: add missing atomic64 operations Some more atomic64 operations were missing and as a result frv allmodconfig was failing. Add the missing operations. Link: http://lkml.kernel.org/r/1485193844-12850-1-git-send-email-sudip.mukherjee@xxxxxxxxxxxxxxx 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 | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff -puN arch/frv/include/asm/atomic.h~frv-add-missing-atomic64-operations arch/frv/include/asm/atomic.h --- a/arch/frv/include/asm/atomic.h~frv-add-missing-atomic64-operations +++ a/arch/frv/include/asm/atomic.h @@ -139,7 +139,7 @@ static inline void atomic64_dec(atomic64 #define atomic64_sub_and_test(i,v) (atomic64_sub_return((i), (v)) == 0) #define atomic64_dec_and_test(v) (atomic64_dec_return((v)) == 0) #define atomic64_inc_and_test(v) (atomic64_inc_return((v)) == 0) - +#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) #define atomic_cmpxchg(v, old, new) (cmpxchg(&(v)->counter, old, new)) #define atomic_xchg(v, new) (xchg(&(v)->counter, new)) @@ -177,6 +177,23 @@ static inline int atomic64_add_unless(at return c != u; } +static inline long long atomic64_dec_if_positive(atomic64_t *v) +{ + long long c, old, dec; + + c = atomic64_read(v); + for (;;) { + dec = c - 1; + if (unlikely(dec < 0)) + break; + old = atomic64_cmpxchg((v), c, dec); + if (likely(old == c)) + break; + c = old; + } + return dec; +} + #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
