diff options
author | Alex Elder <elder@inktank.com> | 2013-05-31 15:17:01 -0500 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 12:24:25 -0800 |
commit | c4d00f5b3e1f48f99d99d813fe8071c719e1790b (patch) | |
tree | 8544dd8b6649ea65ccf09ad47204326be90b8bbd /kernel/posix-cpu-timers.c | |
parent | 350505e73f8c4d03dfef660f40a6f35d5ac12be6 (diff) |
rbd: set removing flag while holding list lock
commit 751cc0e3cfabdda87c4c21519253c6751e97a8d4 upstream.
When unmapping a device, its id is supplied, and that is used to
look up which rbd device should be unmapped. Looking up the
device involves searching the rbd device list while holding
a spinlock that protects access to that list.
Currently all of this is done under protection of the control lock,
but that protection is going away soon. To ensure the rbd_dev is
still valid (still on the list) while setting its REMOVING flag, do
so while still holding the list lock. To do so, get rid of
__rbd_get_dev(), and open code what it did in the one place it
was used.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/posix-cpu-timers.c')
0 files changed, 0 insertions, 0 deletions