path: root/drivers/mtd
diff options
authorJosef Bacik <>2011-07-16 20:44:56 -0400
committerAl Viro <>2011-07-20 20:47:59 -0400
commit02c24a82187d5a628c68edfe71ae60dc135cd178 (patch)
treec8dbaba4d82e2b20ed4335910a564a1f7d90fcf6 /drivers/mtd
parent22735068d53c7115e384bc88dea95b17e76a6839 (diff)
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
Btrfs needs to be able to control how filemap_write_and_wait_range() is called in fsync to make it less of a painful operation, so push down taking i_mutex and the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some file systems can drop taking the i_mutex altogether it seems, like ext3 and ocfs2. For correctness sake I just pushed everything down in all cases to make sure that we keep the current behavior the same for everybody, and then each individual fs maintainer can make up their mind about what to do from there. Thanks, Acked-by: Jan Kara <> Signed-off-by: Josef Bacik <> Signed-off-by: Al Viro <>
Diffstat (limited to 'drivers/mtd')
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 191f3bb3c41a..3320a50ba4f0 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -189,12 +189,16 @@ static loff_t vol_cdev_llseek(struct file *file, loff_t offset, int origin)
return new_offset;
-static int vol_cdev_fsync(struct file *file, int datasync)
+static int vol_cdev_fsync(struct file *file, loff_t start, loff_t end, int datasync)
struct ubi_volume_desc *desc = file->private_data;
struct ubi_device *ubi = desc->vol->ubi;
- return ubi_sync(ubi->ubi_num);
+ struct inode *inode = file->f_path.dentry->d_inode;
+ int err;
+ mutex_lock(&inode->i_mutex);
+ err = ubi_sync(ubi->ubi_num);
+ mutex_unlock(&inode->i_mutex);
+ return err;