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| author | Andreas Gruenbacher <agruenba@redhat.com> | 2017-07-07 18:22:05 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-12 13:01:06 (GMT) |
| commit | 25b2ee6f9d9db9f7efd121cbb39f0db913033d38 (patch) | |
| tree | a9b8ddce863907fe1a604ffdec889702d4a6fb9a /fs/gfs2/incore.h | |
| parent | f59d04e342826cb948724ac43a570702cfc86f36 (diff) | |
| download | linux-25b2ee6f9d9db9f7efd121cbb39f0db913033d38.tar.xz | |
gfs2: Fix glock rhashtable rcu bug
commit 961ae1d83d055a4b9ebbfb4cc8ca62ec1a7a3b74 upstream.
Before commit 88ffbf3e03 "GFS2: Use resizable hash table for glocks",
glocks were freed via call_rcu to allow reading the glock hashtable
locklessly using rcu. This was then changed to free glocks immediately,
which made reading the glock hashtable unsafe. Bring back the original
code for freeing glocks via call_rcu.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/gfs2/incore.h')
| -rw-r--r-- | fs/gfs2/incore.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h index 51519c2..a04bf95 100644 --- a/fs/gfs2/incore.h +++ b/fs/gfs2/incore.h @@ -370,6 +370,7 @@ struct gfs2_glock { loff_t end; } gl_vm; }; + struct rcu_head gl_rcu; struct rhash_head gl_node; }; |