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authorAndreas Gruenbacher <agruenba@redhat.com>2017-07-07 20:22:05 +0200
committerBob Peterson <rpeterso@redhat.com>2017-07-07 20:22:05 +0200
commit961ae1d83d055a4b9ebbfb4cc8ca62ec1a7a3b74 (patch)
tree12a0c8823913a62e339bcdd95ff2e9f26e8702cd /fs/gfs2/incore.h
parentMerge branch 'parisc-4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff)
downloadlinux-961ae1d83d055a4b9ebbfb4cc8ca62ec1a7a3b74.tar.xz
linux-961ae1d83d055a4b9ebbfb4cc8ca62ec1a7a3b74.zip
gfs2: Fix glock rhashtable rcu bug
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> Cc: stable@vger.kernel.org # 4.3+
Diffstat (limited to '')
-rw-r--r--fs/gfs2/incore.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 790e73984288..73fce76e67ee 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -373,6 +373,7 @@ struct gfs2_glock {
loff_t end;
} gl_vm;
};
+ struct rcu_head gl_rcu;
struct rhash_head gl_node;
};