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From: John Baldwin <jhb@FreeBSD.org>
Date: Wed, 4 Jan 2012 16:51:04 +0000 (UTC)
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Subject: svn commit: r229506 - in stable/8/sys: fs/devfs kern
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Author: jhb
Date: Wed Jan  4 16:51:04 2012
New Revision: 229506
URL: http://svn.freebsd.org/changeset/base/229506

Log:
  MFC 227069:
  Move the cleanup of f_cdevpriv when the reference count of a devfs
  file descriptor drops to zero out of _fdrop() and into devfs_close_f()
  as it is only relevant for devfs file descriptors.

Modified:
  stable/8/sys/fs/devfs/devfs_vnops.c
  stable/8/sys/kern/kern_descrip.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)

Modified: stable/8/sys/fs/devfs/devfs_vnops.c
==============================================================================
--- stable/8/sys/fs/devfs/devfs_vnops.c	Wed Jan  4 16:50:12 2012	(r229505)
+++ stable/8/sys/fs/devfs/devfs_vnops.c	Wed Jan  4 16:51:04 2012	(r229506)
@@ -552,6 +552,13 @@ devfs_close_f(struct file *fp, struct th
 	td->td_fpop = fp;
 	error = vnops.fo_close(fp, td);
 	td->td_fpop = fpop;
+
+	/*
+	 * The f_cdevpriv cannot be assigned non-NULL value while we
+	 * are destroying the file.
+	 */
+	if (fp->f_cdevpriv != NULL)
+		devfs_fpdrop(fp);
 	return (error);
 }
 

Modified: stable/8/sys/kern/kern_descrip.c
==============================================================================
--- stable/8/sys/kern/kern_descrip.c	Wed Jan  4 16:50:12 2012	(r229505)
+++ stable/8/sys/kern/kern_descrip.c	Wed Jan  4 16:51:04 2012	(r229506)
@@ -2359,12 +2359,6 @@ _fdrop(struct file *fp, struct thread *t
 		panic("fdrop: count %d", fp->f_count);
 	if (fp->f_ops != &badfileops)
 		error = fo_close(fp, td);
-	/*
-	 * The f_cdevpriv cannot be assigned non-NULL value while we
-	 * are destroying the file.
-	 */
-	if (fp->f_cdevpriv != NULL)
-		devfs_fpdrop(fp);
 	atomic_subtract_int(&openfiles, 1);
 	crfree(fp->f_cred);
 	uma_zfree(file_zone, fp);