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Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
[pandora-kernel.git]
/
fs
/
block_dev.c
diff --git
a/fs/block_dev.c
b/fs/block_dev.c
index
2a6d019
..
6dcee88
100644
(file)
--- a/
fs/block_dev.c
+++ b/
fs/block_dev.c
@@
-406,16
+406,23
@@
static loff_t block_llseek(struct file *file, loff_t offset, int origin)
int blkdev_fsync(struct file *filp, struct dentry *dentry, int datasync)
{
int blkdev_fsync(struct file *filp, struct dentry *dentry, int datasync)
{
- struct block_device *bdev = I_BDEV(filp->f_mapping->host);
+ struct inode *bd_inode = filp->f_mapping->host;
+ struct block_device *bdev = I_BDEV(bd_inode);
int error;
int error;
- error = sync_blockdev(bdev);
- if (error)
- return error;
-
+ /*
+ * There is no need to serialise calls to blkdev_issue_flush with
+ * i_mutex and doing so causes performance issues with concurrent
+ * O_SYNC writers to a block device.
+ */
+ mutex_unlock(&bd_inode->i_mutex);
+
error = blkdev_issue_flush(bdev, NULL);
if (error == -EOPNOTSUPP)
error = 0;
error = blkdev_issue_flush(bdev, NULL);
if (error == -EOPNOTSUPP)
error = 0;
+
+ mutex_lock(&bd_inode->i_mutex);
+
return error;
}
EXPORT_SYMBOL(blkdev_fsync);
return error;
}
EXPORT_SYMBOL(blkdev_fsync);