[src/trunk]: src/sys/external/bsd/drm2/include/linux drm: Need write lock on ...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e286c401b79a
branches:  trunk
changeset: 1028856:e286c401b79a
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sun Dec 19 12:13:08 2021 +0000

description:
drm: Need write lock on vmobjlock for pgo_put.

diffstat:

 sys/external/bsd/drm2/include/linux/shmem_fs.h |  4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diffs (18 lines):

diff -r 33fe9e7ea535 -r e286c401b79a sys/external/bsd/drm2/include/linux/shmem_fs.h
--- a/sys/external/bsd/drm2/include/linux/shmem_fs.h    Sun Dec 19 12:13:01 2021 +0000
+++ b/sys/external/bsd/drm2/include/linux/shmem_fs.h    Sun Dec 19 12:13:08 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: shmem_fs.h,v 1.3 2021/12/19 11:33:49 riastradh Exp $   */
+/*     $NetBSD: shmem_fs.h,v 1.4 2021/12/19 12:13:08 riastradh Exp $   */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -80,6 +80,8 @@
                KASSERT(0 <= start);
                KASSERT(start <= end);
        }
+
+       rw_enter(uobj->vmobjlock, RW_WRITER);
        (*uobj->pgops->pgo_put)(uobj, start, end, flags);
 }