diff options
| author | John David Anglin <dave.anglin@bell.net> | 2015-09-07 20:13:28 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-09-29 19:26:11 +0200 |
| commit | f39b5f920977852886e4491d354e72b95935ec0b (patch) | |
| tree | 390e9685635c35a9c8e05b22f5cedc8d832dfc81 /arch/parisc | |
| parent | 645305df79c555470ab6728561314ea852e2612f (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.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: /* 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 |