[PATCH] ppc64: Fix return value of some vDSO calls

The ppc vDSO would not properly clear the return value for some calls,
which will be a problem when interfacing those calls with glibc. This
should be fixed before 2.6.12 is released (as it is the first kernel
with the ppc vDSO) so that we don't have to play with symbol versioning
and ugly workarounds.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/vdso64/cacheflush.S b/arch/ppc64/kernel/vdso64/cacheflush.S
index d9696ffcf334..e0725b7b7003 100644
--- a/arch/ppc64/kernel/vdso64/cacheflush.S
+++ b/arch/ppc64/kernel/vdso64/cacheflush.S
@@ -47,6 +47,7 @@ V_FUNCTION_BEGIN(__kernel_sync_dicache)
         addi    r6,r6,128
         bdnz    1b
         isync
+        li      r3,0
         blr
   .cfi_endproc
 V_FUNCTION_END(__kernel_sync_dicache)
@@ -59,6 +60,7 @@ V_FUNCTION_BEGIN(__kernel_sync_dicache_p5)
   .cfi_startproc
         sync
         isync
+        li      r3,0
         blr
   .cfi_endproc
 V_FUNCTION_END(__kernel_sync_dicache_p5)