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authorRichard Kuo <rkuo@codeaurora.org>2013-03-21 18:24:19 -0500
committerRichard Kuo <rkuo@codeaurora.org>2013-04-30 19:40:22 -0500
commite0025a72c37ca404fbf31d569439c20bfb04295e (patch)
tree4e7566fd7876f23d5ea5cf2eec5a6d26c5989ce3 /arch/hexagon/include
parent22493cfd78e4db0ba9c9f46dac4757bee5a0294a (diff)
downloadlinux-linaro-stable-e0025a72c37ca404fbf31d569439c20bfb04295e.tar.gz
Hexagon: fix __atomic_add_unless
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Diffstat (limited to 'arch/hexagon/include')
-rw-r--r--arch/hexagon/include/asm/atomic.h20
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h
index 468fbb0781cd..c6670390d255 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)