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>
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 @@
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)
PerformanceMonitor: