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[IA64] __copy_user breaks on unaligned src

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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>
This commit is contained in:
Keith Owens 2005-04-25 13:23:47 -07:00 committed by Tony Luck
parent f0a8d3c9ec
commit 6118ec847e
1 changed files with 1 additions and 1 deletions
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2
arch/ia64/lib/memcpy_mck.S
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@ -300,7 +300,7 @@ EK(.ex_handler, (p[D]) st8 [dst1] = t15, 4*8)
add src_pre_mem=0,src0 // prefetch src pointer add src_pre_mem=0,src0 // prefetch src pointer
add dst_pre_mem=0,dst0 // prefetch dest pointer add dst_pre_mem=0,dst0 // prefetch dest pointer
and src0=-8,src0 // 1st src pointer and src0=-8,src0 // 1st src pointer
(p7) mov ar.lc = r21 (p7) mov ar.lc = cnt
(p8) mov ar.lc = r0 (p8) mov ar.lc = r0
;; ;;
TEXT_ALIGN(32) TEXT_ALIGN(32)