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[IA64] __copy_user breaks on unaligned src
memcpy_mck.S::__copy_user breaks in the prefetch code under these conditions :- * src is unaligned and * dst is near the end of a page and * the page after dst is unmapped. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
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@ -300,7 +300,7 @@ EK(.ex_handler, (p[D]) st8 [dst1] = t15, 4*8)
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add src_pre_mem=0,src0 // prefetch src pointer
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add dst_pre_mem=0,dst0 // prefetch dest pointer
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and src0=-8,src0 // 1st src pointer
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(p7) mov ar.lc = r21
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(p7) mov ar.lc = cnt
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(p8) mov ar.lc = r0
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;;
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TEXT_ALIGN(32)
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