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| author | Keith Busch <keith.busch@intel.com> | 2014-02-21 22:13:44 +0100 |
|---|---|---|
| committer | Matthew Wilcox <matthew.r.wilcox@intel.com> | 2014-03-24 13:45:57 +0100 |
| commit | 5a92e700af2e5e0e6404988d6a7f2ed3dad3f46f (patch) | |
| tree | 0de62a3873a05bb0e21fc5195be6ff20af5366cf /kernel/utsname_sysctl.c | |
| parent | NVMe: Initialize device reference count earlier (diff) | |
| download | linux-5a92e700af2e5e0e6404988d6a7f2ed3dad3f46f.tar.xz linux-5a92e700af2e5e0e6404988d6a7f2ed3dad3f46f.zip | |
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 <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Diffstat (limited to 'kernel/utsname_sysctl.c')
0 files changed, 0 insertions, 0 deletions