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Commit e54bfa31 authored by Liu Bo's avatar Liu Bo Committed by Chris Mason
Browse files

Btrfs: use mnt_want_write_file instead of mnt_want_write 



mnt_want_write_file is faster when file has been opened for write.

Signed-off-by: default avatarLiu Bo <liubo2009@cn.fujitsu.com>
parent 768e9dfe

fs/btrfs/ioctl.c

+2 −2
Original line number Diff line number Diff line
@@ -3265,7 +3265,7 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg) 
	if (!capable(CAP_SYS_ADMIN))

		return -EPERM;



	ret = mnt_want_write(file->f_path.mnt);

	ret = mnt_want_write_file(file);

	if (ret)

		return ret;
@@ -3335,7 +3335,7 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg) 
out:

	mutex_unlock(&fs_info->balance_mutex);

	mutex_unlock(&fs_info->volume_mutex);

	mnt_drop_write(file->f_path.mnt);

	mnt_drop_write_file(file);

	return ret;

}