From: Keith Busch Date: Fri, 21 Feb 2014 21:13:44 +0000 (-0700) Subject: NVMe: RCU protected access to io queues X-Git-Tag: v3.15-rc1~21^2~9 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5a92e700af2e5e0e6404988d6a7f2ed3dad3f46f;p=pandora-kernel.git NVMe: RCU protected access to io queues This adds rcu protected access to nvme_queue to fix a race between a surprise removal freeing the queue and a thread with open reference on a NVMe block device using that queue. The queues do not need to be rcu protected during the initialization or shutdown parts, so I've added a helper function for raw deferencing to get around the sparse errors. There is still a hole in the IOCTL path for the same problem, which is fixed in a subsequent patch. Signed-off-by: Keith Busch Signed-off-by: Matthew Wilcox --- Reading git-diff-tree failed