From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Carpenter <dan.carpenter@oracle.com>
Subject: [patch] vfs: clear to the end of the buffer on reads
Date: Wed, 5 Dec 2012 15:44:03 +0300
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Cc: linux-fsdevel@vger.kernel.org, kernel-janitors@vger.kernel.org,
	Romain Francoise <romain@orebokech.com>,
	Meelis Roos <mroos@linux.ee>, Tony Luck <tony.luck@intel.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
	Linus Torvalds <torvalds@linux-foundation.org>
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READ is zero so this test is always false.  (rw == READ) was intended.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/fs/buffer.c b/fs/buffer.c
index 70ed4d8..e0a59c6 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2931,7 +2931,7 @@ static void guard_bh_eod(int rw, struct bio *bio, struct buffer_head *bh)
 	bio->bi_io_vec[0].bv_len = bytes;
 
 	/* ..and clear the end of the buffer for reads */
-	if (rw & READ) {
+	if (rw == READ) {
 		void *kaddr = kmap_atomic(bh->b_page);
 		memset(kaddr + bh_offset(bh) + bytes, 0, bh->b_size - bytes);
 		kunmap_atomic(kaddr);