diff options
| author | John David Anglin <dave.anglin@bell.net> | 2015-09-07 20:13:28 -0400 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2015-09-08 10:15:54 -0400 |
| commit | 1b59ddfcf1678de38a1f8ca9fb8ea5eebeff1843 (patch) | |
| tree | 77bbe460bdef1ba54a9108178c127475039e993e | |
| parent | b1b4e435e4ef7de77f07bf2a42c8380b960c2d44 (diff) | |
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>
| -rw-r--r-- | arch/parisc/kernel/syscall.S | 2 |
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: | |||
| 821 | /* 64bit CAS */ | 821 | /* 64bit CAS */ |
| 822 | #ifdef CONFIG_64BIT | 822 | #ifdef CONFIG_64BIT |
| 823 | 19: ldd,ma 0(%sr3,%r26), %r29 | 823 | 19: ldd,ma 0(%sr3,%r26), %r29 |
| 824 | sub,= %r29, %r25, %r0 | 824 | sub,*= %r29, %r25, %r0 |
| 825 | b,n cas2_end | 825 | b,n cas2_end |
| 826 | 20: std,ma %r24, 0(%sr3,%r26) | 826 | 20: std,ma %r24, 0(%sr3,%r26) |
| 827 | copy %r0, %r28 | 827 | copy %r0, %r28 |