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authorJohn David Anglin <dave.anglin@bell.net>2015-09-07 20:13:28 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-09-29 19:26:11 +0200
commitf39b5f920977852886e4491d354e72b95935ec0b (patch)
tree390e9685635c35a9c8e05b22f5cedc8d832dfc81 /arch/parisc
parent645305df79c555470ab6728561314ea852e2612f (diff)
parisc: Use double word condition in 64bit CAS operation
commit 1b59ddfcf1678de38a1f8ca9fb8ea5eebeff1843 upstream. The attached change fixes the condition used in the "sub" instruction. A double word comparison is needed. This fixes the 64-bit LWS CAS operation on 64-bit kernels. I can now enable 64-bit atomic support in GCC. Signed-off-by: John David Anglin <dave.anglin> Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/kernel/syscall.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 7ef22e3387e0..0b8d26d3ba43 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -821,7 +821,7 @@ cas2_action:
/* 64bit CAS */
#ifdef CONFIG_64BIT
19: ldd,ma 0(%sr3,%r26), %r29
- sub,= %r29, %r25, %r0
+ sub,*= %r29, %r25, %r0
b,n cas2_end
20: std,ma %r24, 0(%sr3,%r26)
copy %r0, %r28