path: root/mm
diff options
authorJames Bottomley <>2006-03-26 01:36:57 -0800
committerLinus Torvalds <>2006-03-26 08:56:53 -0800
commit03beb07664d768db97bf454ae5c9581cd4737bb4 (patch)
treeb906c4db3a70627a58363193f3f843e7e2132ca1 /mm
parent64a07bd82ed526d813b64b0957543eef55bdf9c0 (diff)
[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 <> Cc: Russell King <> Cc: "David S. Miller" <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'mm')
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c
index e347e106ca3a..67686048f094 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1071,6 +1071,8 @@ int get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
if (pages) {
pages[i] = page;
+ flush_anon_page(page, start);
if (vmas)