svn commit: r294204 - head/sys/fs/devfs

[Konstantin Belousov]

Author: kib
Date: Sun Jan 17 08:34:35 2016
New Revision: 294204
URL: https://svnweb.freebsd.org/changeset/base/294204

Log:
  Assert that the linkage between struct cdev_privdata and and struct
  file is consistent.
  
  Tested by:	pho
  Sponsored by:	The FreeBSD Foundation
  MFC after:	2 weeks

Modified:
  head/sys/fs/devfs/devfs_vnops.c

Modified: head/sys/fs/devfs/devfs_vnops.c
==============================================================================
--- head/sys/fs/devfs/devfs_vnops.c	Sun Jan 17 06:02:59 2016	(r294203)
+++ head/sys/fs/devfs/devfs_vnops.c	Sun Jan 17 08:34:35 2016	(r294204)
@@ -185,6 +185,8 @@ devfs_destroy_cdevpriv(struct cdev_privd
 {
 
 	mtx_assert(&cdevpriv_mtx, MA_OWNED);
+	KASSERT(p->cdpd_fp->f_cdevpriv == p,
+	    ("devfs_destoy_cdevpriv %p != %p", p->cdpd_fp->f_cdevpriv, p));
 	p->cdpd_fp->f_cdevpriv = NULL;
 	LIST_REMOVE(p, cdpd_list);
 	mtx_unlock(&cdevpriv_mtx);