From: Jeff Mahoney <jeffm@suse.com>
Date: Mon, 26 Jun 2006 07:27:22 +0000 (-0700)
Subject: [PATCH] dm: change minor_lock to spinlock
X-Git-Tag: v2.6.18-rc1~666
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f32c10b09940cffc3620ce111315ec44343fd3ca;p=pandora-kernel.git

[PATCH] dm: change minor_lock to spinlock

While removing a device, another another thread might attempt to resurrect it.

This patch replaces the _minor_lock mutex with a spinlock and uses
atomic_dec_and_lock() to serialize reference counting in dm_put().

[akpm: too late for 2.6.17 - suitable for 2.6.17.x after it has settled]

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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