From 37f9ef553bed630957e025504cdcbc76f5de49d5 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Fri, 12 Jun 2009 16:46:47 +1000 Subject: 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 --- arch/powerpc/kernel/head_32.S | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'arch') 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) PerformanceMonitor: -- cgit v1.1