diff options
| author | Mathieu Desnoyers <compudj@krystal.dyndns.org> | 2007-05-08 09:34:38 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 20:15:20 +0200 |
| commit | 2856f5e31c1413bf6e4f1371e07e17078a5fee5e (patch) | |
| tree | 587dfe584f0913813d0cf2414a9378618143db15 /include/asm-sparc64 | |
| parent | atomic.h: add atomic64 cmpxchg, xchg and add_unless to x86_64 (diff) | |
| download | linux-2856f5e31c1413bf6e4f1371e07e17078a5fee5e.tar.xz linux-2856f5e31c1413bf6e4f1371e07e17078a5fee5e.zip | |
atomic.h: atomic_add_unless as inline. Remove system.h atomic.h circular dependency
atomic_add_unless as inline. Remove system.h atomic.h circular dependency.
I agree (with Andi Kleen) this typeof is not needed and more error
prone. All the original atomic.h code that uses cmpxchg (which includes
the atomic_add_unless) uses defines instead of inline functions,
probably to circumvent a circular dependency between system.h and
atomic.h on powerpc (which my patch addresses). Therefore, it makes
sense to use inline functions that will provide type checking.
atomic_add_unless as inline. Remove system.h atomic.h circular dependency.
Digging into the FRV architecture shows me that it is also affected by
such a circular dependency. Here is the diff applying this against the
rest of my atomic.h patches.
It applies over the atomic.h standardization patches.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-sparc64')
| -rw-r--r-- | include/asm-sparc64/atomic.h | 59 |
1 files changed, 31 insertions, 28 deletions
diff --git a/include/asm-sparc64/atomic.h b/include/asm-sparc64/atomic.h index c3feb3af2cfe..3fb4e1f7f186 100644 --- a/include/asm-sparc64/atomic.h +++ b/include/asm-sparc64/atomic.h @@ -9,6 +9,7 @@ #define __ARCH_SPARC64_ATOMIC__ #include <linux/types.h> +#include <asm/system.h> typedef struct { volatile int counter; } atomic_t; typedef struct { volatile __s64 counter; } atomic64_t; @@ -73,40 +74,42 @@ extern int atomic64_sub_ret(int, atomic64_t *); #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) -#define atomic_add_unless(v, a, u) \ -({ \ - __typeof__((v)->counter) c, old; \ - c = atomic_read(v); \ - for (;;) { \ - if (unlikely(c == (u))) \ - break; \ - old = atomic_cmpxchg((v), c, c + (a)); \ - if (likely(old == c)) \ - break; \ - c = old; \ - } \ - likely(c != (u)); \ -}) +static __inline__ int atomic_add_unless(atomic_t *v, int a, int u) +{ + int c, old; + c = atomic_read(v); + for (;;) { + if (unlikely(c == (u))) + break; + old = atomic_cmpxchg((v), c, c + (a)); + if (likely(old == c)) + break; + c = old; + } + return c != (u); +} + #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) #define atomic64_cmpxchg(v, o, n) \ ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n))) #define atomic64_xchg(v, new) (xchg(&((v)->counter), new)) -#define atomic64_add_unless(v, a, u) \ -({ \ - __typeof__((v)->counter) c, old; \ - c = atomic64_read(v); \ - for (;;) { \ - if (unlikely(c == (u))) \ - break; \ - old = atomic64_cmpxchg((v), c, c + (a)); \ - if (likely(old == c)) \ - break; \ - c = old; \ - } \ - likely(c != (u)); \ -}) +static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u) +{ + long c, old; + c = atomic64_read(v); + for (;;) { + if (unlikely(c == (u))) + break; + old = atomic64_cmpxchg((v), c, c + (a)); + if (likely(old == c)) + break; + c = old; + } + return c != (u); +} + #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) /* Atomic operations are already serializing */ |