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gfs2: Fix glock rhashtable rcu bug
authorAndreas Gruenbacher <agruenba@redhat.com>
Fri, 7 Jul 2017 18:22:05 +0000 (13:22 -0500)
committerBob Peterson <rpeterso@redhat.com>
Fri, 7 Jul 2017 18:22:05 +0000 (13:22 -0500)
commit961ae1d83d055a4b9ebbfb4cc8ca62ec1a7a3b74
tree12a0c8823913a62e339bcdd95ff2e9f26e8702cdtree | snapshot (tar.gz zip)
parent9b51f04424e17051a89ab32d892ca66b2a104825commit | diff
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+
fs/gfs2/glock.c diff | blob | blame | history
fs/gfs2/incore.h diff | blob | blame | history