The patch titled
Subject: fs: ramfs: file-nommu: add SetPageUptodate()
has been removed from the -mm tree. Its filename was
fs-ramfs-file-nommu-add-setpageuptodate.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Bob Liu <[email protected]>
Subject: fs: ramfs: file-nommu: add SetPageUptodate()
There is a bug in the below scenario for !CONFIG_MMU:
1. create a new file
2. mmap the file and write to it
3. read the file can't get the correct value
Because
sys_read() > generic_file_aio_read() > simple_readpage() > clear_page()
which make the page be zeroed.
Add SetPageUptodate() to ramfs_nommu_expand_for_mapping() so that
generic_file_aio_read() do not call simple_readpage().
Signed-off-by: Bob Liu <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: David Howells <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Greg Ungerer <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
fs/ramfs/file-nommu.c | 1 +
1 file changed, 1 insertion(+)
diff -puN fs/ramfs/file-nommu.c~fs-ramfs-file-nommu-add-setpageuptodate
fs/ramfs/file-nommu.c
--- a/fs/ramfs/file-nommu.c~fs-ramfs-file-nommu-add-setpageuptodate
+++ a/fs/ramfs/file-nommu.c
@@ -110,6 +110,7 @@ int ramfs_nommu_expand_for_mapping(struc
/* prevent the page from being discarded on memory pressure */
SetPageDirty(page);
+ SetPageUptodate(page);
unlock_page(page);
put_page(page);
_
Patches currently in -mm which might be from [email protected] are
origin.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
