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 <lliu...@gmail.com>
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 <lliu...@gmail.com>
Cc: Hugh Dickins <hu...@google.com>
Cc: David Howells <dhowe...@redhat.com>
Cc: Geert Uytterhoeven <ge...@linux-m68k.org>
Cc: Greg Ungerer <g...@uclinux.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
---
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 lliu...@gmail.com are
origin.patch
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