diff options
| author |   Mark Rutland <mark.rutland@arm.com> | 2018-06-21 13:13:11 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-06-21 14:25:21 +0200 |
| commit | 00b808ab79ead372daf1a0682d1ef271599c0b55 (patch) | |
| tree | b6b2384e169533b9f40e213f7cb49cab190c23f5 /include/asm-generic | |
| parent | atomics: Prepare for atomic64_fetch_add_unless() (diff) | |
| download | wireguard-linux-00b808ab79ead372daf1a0682d1ef271599c0b55.tar.xz wireguard-linux-00b808ab79ead372daf1a0682d1ef271599c0b55.zip | |
atomics/generic: Define atomic64_fetch_add_unless()
As a step towards unifying the atomic/atomic64/atomic_long APIs, this
patch converts the generic implementation of atomic64_add_unless() into
a generic implementation of atomic64_fetch_add_unless().
A wrapper in <linux/atomic.h> will build atomic_add_unless() atop of
this, provided it is given a preprocessor definition.
No functional change is intended as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/lkml/20180621121321.4761-9-mark.rutland@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/atomic64.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/asm-generic/atomic64.h b/include/asm-generic/atomic64.h index 5105275ac825..49460107b29a 100644 --- a/include/asm-generic/atomic64.h +++ b/include/asm-generic/atomic64.h @@ -53,7 +53,8 @@ ATOMIC64_OPS(xor) extern long long atomic64_dec_if_positive(atomic64_t *v); extern long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n); extern long long atomic64_xchg(atomic64_t *v, long long new); -extern bool atomic64_add_unless(atomic64_t *v, long long a, long long u); +extern long long atomic64_fetch_add_unless(atomic64_t *v, long long a, long long u); +#define atomic64_fetch_add_unless atomic64_fetch_add_unless #define atomic64_add_negative(a, v) (atomic64_add_return((a), (v)) < 0) #define atomic64_inc(v) atomic64_add(1LL, (v)) |