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| author | Richard Kuo <rkuo@codeaurora.org> | 2013-03-21 18:24:19 -0500 |
|---|---|---|
| committer | Richard Kuo <rkuo@codeaurora.org> | 2013-03-27 22:13:58 -0500 |
| commit | c1d5e479d8a99de0417c44ddf9dbd8dab541c91e (patch) | |
| tree | 5d073ed4dda03a0d859ea0b0e951ae9c36622599 | |
| parent | 2d4978d795396e42690ad3e209e9b02dcece66a8 (diff) | |
| download | linux-hexagon-kernel-c1d5e479d8a99de0417c44ddf9dbd8dab541c91e.tar.gz | |
Hexagon: fix __atomic_add_unless
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
| -rw-r--r-- | arch/hexagon/include/asm/atomic.h | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h index 468fbb0781cdfb..c6670390d25554 100644 --- a/arch/hexagon/include/asm/atomic.h +++ b/arch/hexagon/include/asm/atomic.h @@ -117,35 +117,37 @@ static inline int atomic_sub_return(int i, atomic_t *v) #define atomic_sub(i, v) atomic_sub_return(i, (v)) /** - * atomic_add_unless - add unless the number is a given value + * __atomic_add_unless - add unless the number is a given value * @v: pointer to value * @a: amount to add * @u: unless value is equal to u * - * Returns 1 if the add happened, 0 if it didn't. + * Returns old value. + * */ + static inline int __atomic_add_unless(atomic_t *v, int a, int u) { - int output, __oldval; + int __oldval; + register int tmp; + asm volatile( "1: %0 = memw_locked(%2);" " {" " p3 = cmp.eq(%0, %4);" " if (p3.new) jump:nt 2f;" - " %0 = add(%0, %3);" - " %1 = #0;" + " %1 = add(%0, %3);" " }" - " memw_locked(%2, p3) = %0;" + " memw_locked(%2, p3) = %1;" " {" " if !p3 jump 1b;" - " %1 = #1;" " }" "2:" - : "=&r" (__oldval), "=&r" (output) + : "=&r" (__oldval), "=&r" (tmp) : "r" (v), "r" (a), "r" (u) : "memory", "p3" ); - return output; + return __oldval; } #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) |