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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>
This commit is contained in:
Benjamin Herrenschmidt 2009-06-12 16:46:47 +10:00
parent 10f52dd9fe
commit 37f9ef553b
1 changed files with 4 additions and 2 deletions
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6
arch/powerpc/kernel/head_32.S
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@ -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: