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From: Edward Tomasz Napierala <trasz@FreeBSD.org>
Date: Mon, 24 Aug 2015 14:04:45 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r287109 - head/sys/fs/devfs
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Author: trasz
Date: Mon Aug 24 14:04:44 2015
New Revision: 287109
URL: https://svnweb.freebsd.org/changeset/base/287109

Log:
  Make it possible to forcibly unmount devfs.
  
  MFC after:	1 month
  Sponsored by:	The FreeBSD Foundation

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

Modified: head/sys/fs/devfs/devfs_vfsops.c
==============================================================================
--- head/sys/fs/devfs/devfs_vfsops.c	Mon Aug 24 13:46:12 2015	(r287108)
+++ head/sys/fs/devfs/devfs_vfsops.c	Mon Aug 24 14:04:44 2015	(r287109)
@@ -182,6 +182,8 @@ devfs_unmount(struct mount *mp, int mntf
 	fmp = VFSTODEVFS(mp);
 	KASSERT(fmp->dm_mount != NULL,
 		("devfs_unmount unmounted devfs_mount"));
+	if (mntflags & MNT_FORCE)
+		flags |= FORCECLOSE;
 	/* There is 1 extra root vnode reference from devfs_mount(). */
 	error = vflush(mp, 1, flags, curthread);
 	if (error)