'notify' undefined in mainline-2.5 patch 185

[Dale Dude <dale@xxxxxxxxxxxxxxx>]

I this notify error whenever I use any of the performance xlators like 
write-behind. Did I miss something during the compile?

E [xlator.c:154:xlator_set_type] libglusterfs/xlator: dlsym(notify) on 
/lib/glusterfs/1.3.0-pre5/xlator/performance/write-behind.so: undefined 
symbol: notify -- neglecting