linux-kernel - mtdchar kernel oops

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Date:	Sun, 15 Apr 2012 13:58:39 +0200 (CEST)
From:	Joel Reardon <joel@...mbassador.com>
To:	Artem Bityutskiy <dedekind1@...il.com>
cc:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: mtdchar kernel oops

I think that this patch:
"mtdchar: kill persistently held vfsmount"
http://permalink.gmane.org/gmane.linux.kernel.commits.head/314175

has started causing kernel oops's when running ubiformat. The oops is
occuring in fs/namespace.c's mnt_add_count() line:
        this_cpu_add(mnt->mnt_pcp->mnt_count, n);

with the stack trace:
mntget()
simple_pin_fs()
mtdchar_open()

Cheers,
Joel
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