tree 8b0a89a0de01a0504a002a184a290a53545fce82
parent 662e3a551b468c7338f5291d7a00389fe85885e2
author Steven Whitehouse <swhiteho@redhat.com> 1299668284 +0000
committer Steven Whitehouse <swhiteho@redhat.com> 1299668284 +0000

GFS2: Fix glock deallocation race

This patch fixes a race in deallocating glocks which was introduced
in the RCU glock patch. We need to ensure that the glock count is
kept correct even in the case that there is a race to add a new
glock into the hash table. Also, to avoid having to wait for an
RCU grace period, the glock counter can be decremented before
call_rcu() is called.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>