From: Fabian Frederick Subject: [PATCH 1/1 linux-next] ext4: atomically read inode size Date: Mon, 23 Jan 2017 18:56:09 +0100 Message-ID: <20170123175609.6032-1-fabf@skynet.be> Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, fabf@skynet.be To: tytso@mit.edu Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org See i_size_read() comments in include/linux/fs.h Signed-off-by: Fabian Frederick --- fs/ext4/super.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 9d15a62..3746f77 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3798,7 +3798,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) goto cantfind_ext4; /* check blocks count against device size */ - blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; + blocks_count = i_size_read(sb->s_bdev->bd_inode) >> + sb->s_blocksize_bits; if (blocks_count && ext4_blocks_count(es) > blocks_count) { ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " "exceeds size of device (%llu blocks)", -- 2.9.3