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From: Jean-Sebastien Pedron <dumbbell@FreeBSD.org>
Date: Sat, 23 Mar 2013 20:43:26 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r248661 - head/sys/dev/drm2/ttm
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Author: dumbbell
Date: Sat Mar 23 20:43:26 2013
New Revision: 248661
URL: http://svnweb.freebsd.org/changeset/base/248661

Log:
  drm/ttm: Explain why we don't need to acquire a ref in ttm_bo_vm_ctor()

Modified:
  head/sys/dev/drm2/ttm/ttm_bo_vm.c

Modified: head/sys/dev/drm2/ttm/ttm_bo_vm.c
==============================================================================
--- head/sys/dev/drm2/ttm/ttm_bo_vm.c	Sat Mar 23 20:17:32 2013	(r248660)
+++ head/sys/dev/drm2/ttm/ttm_bo_vm.c	Sat Mar 23 20:43:26 2013	(r248661)
@@ -252,6 +252,11 @@ ttm_bo_vm_ctor(void *handle, vm_ooffset_
     vm_ooffset_t foff, struct ucred *cred, u_short *color)
 {
 
+	/*
+	 * We don't acquire a reference on bo->kref here, because it was
+	 * already done in ttm_bo_mmap_single().
+	 */
+
 	*color = 0;
 	return (0);
 }