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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-02-26 08:09:00 +1100
committerPaul Mackerras <paulus@samba.org>2006-02-28 16:25:54 +1100
commit634473db86502b6444c3cebd279a06e0b8737527 (patch)
tree15b898352bc7fbfbc1a6cc9ef674eef89313dc59 /arch/powerpc/kernel
parent827c1a6c1a5dcb2902fecfb648f9af6a532934eb (diff)
[PATCH] powerpc: vdso 64bits gettimeofday bug
A bug in the assembly code of the vdso can cause gettimeofday() to hang or to return incorrect results. The wrong register was used to test for pending updates of the calibration variables and to create a dependency for subsequent loads. This fixes it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/vdso64/gettimeofday.S4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/vdso64/gettimeofday.S b/arch/powerpc/kernel/vdso64/gettimeofday.S
index ccaeda5136d..4ee871f1cad 100644
--- a/arch/powerpc/kernel/vdso64/gettimeofday.S
+++ b/arch/powerpc/kernel/vdso64/gettimeofday.S
@@ -225,9 +225,9 @@ V_FUNCTION_BEGIN(__do_get_xsec)
.cfi_startproc
/* check for update count & load values */
1: ld r8,CFG_TB_UPDATE_COUNT(r3)
- andi. r0,r4,1 /* pending update ? loop */
+ andi. r0,r8,1 /* pending update ? loop */
bne- 1b
- xor r0,r4,r4 /* create dependency */
+ xor r0,r8,r8 /* create dependency */
add r3,r3,r0
/* Get TB & offset it */