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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-06-12 16:46:47 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-06-12 16:51:41 +1000
commit37f9ef553bed630957e025504cdcbc76f5de49d5 (patch)
tree4e58497fe49c04de4217af5e601bef92706aebca /arch
parent10f52dd9febf0302bc458a6ea7979767dfa9f3b6 (diff)
downloadop-kernel-dev-37f9ef553bed630957e025504cdcbc76f5de49d5.zip
op-kernel-dev-37f9ef553bed630957e025504cdcbc76f5de49d5.tar.gz
powerpc: Fix bug in move of altivec code to vector.S
The patch that moved to vector.S and made common between 32 and 64-bit the altivec code had a nasty bug on 32-bit (did I really test that ?) which causes the kernel to blr back into userspace ... oops :-) Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/kernel/head_32.S6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index 6437f90..4846946 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -733,9 +733,11 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_NEED_DTLB_SW_LRU)
AltiVecUnavailable:
EXCEPTION_PROLOG
#ifdef CONFIG_ALTIVEC
- bne load_up_altivec /* if from user, just load it up */
+ beq 1f
+ bl load_up_altivec /* if from user, just load it up */
+ b fast_exception_return
#endif /* CONFIG_ALTIVEC */
- addi r3,r1,STACK_FRAME_OVERHEAD
+1: addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_EE_LITE(0xf20, altivec_unavailable_exception)
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