tree b906c4db3a70627a58363193f3f843e7e2132ca1
parent 64a07bd82ed526d813b64b0957543eef55bdf9c0
author James Bottomley <James.Bottomley@SteelEye.com> 1143365817 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1143392213 -0800

[PATCH] Add API for flushing Anon pages

Currently, get_user_pages() returns fully coherent pages to the kernel for
anything other than anonymous pages.  This is a problem for things like
fuse and the SCSI generic ioctl SG_IO which can potentially wish to do DMA
to anonymous pages passed in by users.

The fix is to add a new memory management API: flush_anon_page() which
is used in get_user_pages() to make anonymous pages coherent.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>