commit 0db59e5929 upstream.
As it is, we have debugfs_remove() racing with symlink traversals.
Supply ->evict_inode() and do freeing there - inode will remain
pinned until we are done with the symlink body.
And rip the idiocy with checking if dentry is positive right after
we'd verified debugfs_positive(), which is a stronger check...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[bwh: Backported to 3.2:
- Plumb in debugfs_super_operations, which we didn't previously define
- Call truncate_inode_pages() instead of truncate_inode_pages_final()
- Call end_writeback() instead of clear_inode()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
915f4f86dd