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authorJohn David Anglin <dave.anglin@bell.net>2015-09-07 20:13:28 -0400
committerHelge Deller <deller@gmx.de>2015-09-08 16:15:54 +0200
commit1b59ddfcf1678de38a1f8ca9fb8ea5eebeff1843 (patch)
tree77bbe460bdef1ba54a9108178c127475039e993e /arch/parisc
parentb1b4e435e4ef7de77f07bf2a42c8380b960c2d44 (diff)
downloadlinux-1b59ddfcf1678de38a1f8ca9fb8ea5eebeff1843.tar.bz2
parisc: Use double word condition in 64bit CAS operation
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. Cc: <stable@vger.kernel.org> Signed-off-by: John David Anglin <dave.anglin> Signed-off-by: Helge Deller <deller@gmx.de>
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