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busybox: mdev: Use mdev.seq

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/dev/mdev.seq exists to synchronize concurrently running instances of
mdev and to ensure that they execute in the proper order.  Without this
synchronization, it is possible to have inconsistent mount points, to
leak device nodes, or to have a node erroneously removed in rapid
hotplug scenarios.

Enable the use of mdev.seq by creating an empty /dev/mdev.seq at boot.

(From OE-Core rev: 3b256653ae9ab2cf56b21cb82a8bd2a562397b27)

Signed-off-by: Richard Tollerton <rich.tollerton@ni.com>
Signed-off-by: Ben Shelton <ben.shelton@ni.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Bill Pittman
2014-07-21 11:53:46 -05:00
committed by Richard Purdie
parent 67e1a5244d
commit 034790df8f
1 changed files with 1 additions and 0 deletions
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@@ -4,5 +4,6 @@ mount -t tmpfs tmpfs /dev -o size=64k,mode=0755
mkdir /dev/pts /dev/shm
chmod 777 /dev/shm
mount -t devpts devpts /dev/pts
touch /dev/mdev.seq
echo "/sbin/mdev" > /proc/sys/kernel/hotplug
mdev -s