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Commitfc0e38dae6("GFS2: Fix glock deallocation race") fixed a sd_glock_disposal accounting bug by adding a missing atomic_dec statement, but it failed to wake up sd_glock_wait when that decrement causes sd_glock_disposal to reach zero. As a consequence, gfs2_gl_hash_clear can now run into a 10-minute timeout instead of being woken up. Add the missing wakeup. Fixes:fc0e38dae6("GFS2: Fix glock deallocation race") Cc: stable@vger.kernel.org # v2.6.39+ Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>