linux-kernel - Re: [PATCH] isapnp driver semaphore to mutex

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Date:	Mon, 3 Dec 2007 20:11:59 +0100
From:	Michal Schmidt <mschmidt@...hat.com>
To:	Daniel Walker <dwalker@...sta.com>
Cc:	Ingo Molnar <mingo@...e.hu>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux@...mer.net,
	jonathan@...masters.org
Subject: Re: [PATCH] isapnp driver semaphore to mutex

Dne Mon, 03 Dec 2007 10:35:01 -0800
Daniel Walker <dwalker@...sta.com> napsal(a):

> Speaking of automating.. I created a little .vimrc add-on which helps
> doing sem2mutex type changes. Here's the chunk I added,
> 
>     function Semtomutex( lo )
>         exe '%s/down(&'.a:lo.')/mutex_lock\(\&'.a:lo.'\)/g'
>         exe '%s/down_trylock(&'.a:lo.')/mutex_trylock\(\&'.a:lo.'\)/g'

>From the comment above mutex_trylock():
 * NOTE: this function follows the spin_trylock() convention, so
 * it is negated to the down_trylock() return values! Be careful
 * about this when converting semaphore users to mutexes.

Michal
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