tree dbba0c705ee66046e6fbf114365ee16c49fb6163
parent 609ae595f0358157b19311b0f9f9591db7cee705
author Jason Evans <je@fb.com> 1350330539 -0700
committer Jason Evans <je@fb.com> 1350330539 -0700

Add ctl_mutex proection to arena_i_dss_ctl().

Add ctl_mutex proection to arena_i_dss_ctl(), since ctl_stats.narenas is
accessed.