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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2006-12-12 18:14:56 +0100
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-13 18:27:08 +0100
commitbcd022801ee514e28c32837f0b3ce18c775f1a7b (patch)
tree6230fbec80e9f1c7580efa685ded26f638f81ef0 /include/asm-sh64
parent[PATCH] Pass vma argument to copy_user_highpage(). (diff)
downloadlinux-bcd022801ee514e28c32837f0b3ce18c775f1a7b.tar.xz
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[PATCH] MIPS: Fix COW D-cache aliasing on fork
Provide a custom copy_user_highpage() to deal with aliasing issues on MIPS. It uses kmap_coherent() to map an user page for kernel with same color. Rewrite copy_to_user_page() and copy_from_user_page() with the new interfaces to avoid extra cache flushing. The main part of this patch was originally written by Ralf Baechle; Atushi Nemoto did the the debugging. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-sh64')
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