From: Richard Kuo <rkuo@codeaurora.org>
Date: Thu, 21 Mar 2013 23:24:19 +0000 (-0500)
Subject: Hexagon: fix __atomic_add_unless
X-Git-Tag: next-20130402~108^2~23
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c1d5e479d8a99de0417c44ddf9dbd8dab541c91e;p=karo-tx-linux.git

Hexagon: fix __atomic_add_unless

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
---

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)