vfs: mnt_drop_write_file()

new helper (wrapper around mnt_drop_write()) to be used in pair with
mnt_want_write_file().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 6 insertions, 6 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 20dd8f3b6c7..5441ff1480f 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -259,7 +259,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
 
         btrfs_end_transaction(trans, root);
 
-        mnt_drop_write(file->f_path.mnt);
+        mnt_drop_write_file(file);
 
         ret = 0;
  out_unlock:
@@ -1971,7 +1971,7 @@ out_dput:
         dput(dentry);
 out_unlock_dir:
         mutex_unlock(&dir->i_mutex);
-        mnt_drop_write(file->f_path.mnt);
+        mnt_drop_write_file(file);
 out:
         kfree(vol_args);
         return err;
@@ -2040,7 +2040,7 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp)
                 ret = -EINVAL;
         }
 out:
-        mnt_drop_write(file->f_path.mnt);
+        mnt_drop_write_file(file);
         return ret;
 }
 
@@ -2510,7 +2510,7 @@ out_unlock:
 out_fput:
         fput(src_file);
 out_drop_write:
-        mnt_drop_write(file->f_path.mnt);
+        mnt_drop_write_file(file);
         return ret;
 }
 
@@ -2565,7 +2565,7 @@ static long btrfs_ioctl_trans_start(struct file *file)
 
 out_drop:
         atomic_dec(&root->fs_info->open_ioctl_trans);
-        mnt_drop_write(file->f_path.mnt);
+        mnt_drop_write_file(file);
 out:
         return ret;
 }
@@ -2800,7 +2800,7 @@ long btrfs_ioctl_trans_end(struct file *file)
 
         atomic_dec(&root->fs_info->open_ioctl_trans);
 
-        mnt_drop_write(file->f_path.mnt);
+        mnt_drop_write_file(file);
         return 0;
 }