linux-kernel - Re: [PATCH] lockdep, rwsem: fix down_write_nest_lock() if !CONFIG_DEBUG_LOCK

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Date:	Tue, 15 Jan 2013 14:14:52 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Jiri Kosina <jkosina@...e.cz>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Andrew Clayton <andrew@...ital-domain.net>,
	Zlatko Calusic <zlatko.calusic@...on.hr>
Subject: Re: [PATCH] lockdep, rwsem: fix down_write_nest_lock() if !CONFIG_DEBUG_LOCK_ALLOC

On 01/15/2013 02:12 PM, Jiri Kosina wrote:
> Commit 1b963c81b1 ("lockdep, rwsem: provide down_write_nest_lock()")
> contains a bug in a codepath when CONFIG_DEBUG_LOCK_ALLOC is disabled,
> which causes down_read() to be called instead of down_write() by mistake
> on such configurations. Fix that.
>
> Reported-by: Andrew Clayton <andrew@...ital-domain.net>
> Reported-by: Zlatko Calusic <zlatko.calusic@...on.hr>
> Tested-by: Andrew Clayton <andrew@...ital-domain.net>
> Signed-off-by: Jiri Kosina <jkosina@...e.cz>

Reviewed-by: Rik van Riel <riel@...hat.com>


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