]> err.no Git - linux-2.6/commit
[PATCH] MIPS: Fix COW D-cache aliasing on fork
authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Tue, 12 Dec 2006 17:14:56 +0000 (17:14 +0000)
committerLinus Torvalds <torvalds@woody.osdl.org>
Wed, 13 Dec 2006 17:27:08 +0000 (09:27 -0800)
commitbcd022801ee514e28c32837f0b3ce18c775f1a7b
tree6230fbec80e9f1c7580efa685ded26f638f81ef0
parent9de455b20705f36384a711d4a20bcf7ba1ab180b
[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>
arch/mips/mm/init.c
include/asm-mips/page.h