mark struct file that had write access grabbed by open()

[linux-block.git] / fs / file_table.c

diff --git a/fs/file_table.c b/fs/file_table.c
index ee20658a0647715417fe16a21b0e0c60eef902c0..ce1504fec5a14d3e743a8af7d59c7ecf527a88d5 100644 (file)
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -177,43 +177,12 @@ struct file *alloc_file(struct path *path, fmode_t mode,
        file->f_mapping = path->dentry->d_inode->i_mapping;
        file->f_mode = mode;
        file->f_op = fop;
-
-       /*
-        * These mounts don't really matter in practice
-        * for r/o bind mounts.  They aren't userspace-
-        * visible.  We do this for consistency, and so
-        * that we can do debugging checks at __fput()
-        */
-       if ((mode & FMODE_WRITE) && !special_file(path->dentry->d_inode->i_mode)) {
-               WARN_ON(mnt_clone_write(path->mnt));
-       }
        if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
                i_readcount_inc(path->dentry->d_inode);
        return file;
 }
 EXPORT_SYMBOL(alloc_file);
 
-/**
- * drop_file_write_access - give up ability to write to a file
- * @file: the file to which we will stop writing
- *
- * This is a central place which will give up the ability
- * to write to @file, along with access to write through
- * its vfsmount.
- */
-static void drop_file_write_access(struct file *file)
-{
-       struct vfsmount *mnt = file->f_path.mnt;
-       struct dentry *dentry = file->f_path.dentry;
-       struct inode *inode = dentry->d_inode;
-
-       if (special_file(inode->i_mode))
-               return;
-
-       put_write_access(inode);
-       __mnt_drop_write(mnt);
-}
-
 /* the real guts of fput() - releasing the last reference to file
  */
 static void __fput(struct file *file)
@@ -248,8 +217,10 @@ static void __fput(struct file *file)
        put_pid(file->f_owner.pid);
        if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
                i_readcount_dec(inode);
-       if (file->f_mode & FMODE_WRITE)
-               drop_file_write_access(file);
+       if (file->f_mode & FMODE_WRITER) {
+               put_write_access(inode);
+               __mnt_drop_write(mnt);
+       }
        file->f_path.dentry = NULL;
        file->f_path.mnt = NULL;
        file->f_inode = NULL;