[3.11.y.z extended stable] Patch "ext4: use i_size_read in ext4_unaligned_aio()" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    ext4: use i_size_read in ext4_unaligned_aio()

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 0996282b27bd11114cd5307924670d2b90f2bbdd Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso at mit.edu>
Date: Sat, 12 Apr 2014 12:45:25 -0400
Subject: ext4: use i_size_read in ext4_unaligned_aio()

commit 6e6358fc3c3c862bfe9a5bc029d3f8ce43dc9765 upstream.

We haven't taken i_mutex yet, so we need to use i_size_read().

Signed-off-by: "Theodore Ts'o" <tytso at mit.edu>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 fs/ext4/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 319c9d2..eb48bea 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -82,7 +82,7 @@ ext4_unaligned_aio(struct inode *inode, const struct iovec *iov,
 	size_t count = iov_length(iov, nr_segs);
 	loff_t final_size = pos + count;

-	if (pos >= inode->i_size)
+	if (pos >= i_size_read(inode))
 		return 0;

 	if ((pos & blockmask) || (final_size & blockmask))
--
1.9.1