From: Jeremy Kerr <jk@ozlabs.org>
Date: Tue, 29 Sep 2015 04:14:16 +0000 (+0800)
Subject: discover/ipmi: Use advisory locking on ipmi device
X-Git-Tag: v1.0.0~39
X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=commitdiff_plain;h=420f0e2c5d8338b42047c58f055cdb944685ead7;hp=420f0e2c5d8338b42047c58f055cdb944685ead7

discover/ipmi: Use advisory locking on ipmi device

The ipmi module is shared between pb-config and pb-discover. During
system initilisation, we're likely to have a few invocations of
pb-config running, as well as pb-discover starting.

We may have multiple potential concurrent accesses to the ipmi device
node. To avoid problems, this change introduces a fcntl lock on the
device node.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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