linux-kernel - Re: [PATCH 6/7] sound: autoconvert trivial BKL users to private mutex

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Date:	Tue, 14 Sep 2010 23:16:43 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/7] sound: autoconvert trivial BKL users to private mutex

At Tue, 14 Sep 2010 21:53:41 +0200,
Arnd Bergmann wrote:
> 
> The usage of the BKL in the OSS sound drivers is
> trivial, and each of them only locks against itself,
> so it can be turned into per-driver mutexes.
> 
> This is the script that was used for the conversion:
> 
> file=$1
> name=$2
> if grep -q lock_kernel ${file} ; then
>     if grep -q 'include.*linux.mutex.h' ${file} ; then
>             sed -i '/include.*<linux\/smp_lock.h>/d' ${file}
>     else
>             sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file}
>     fi
>     sed -i ${file} \
>         -e "/^#include.*linux.mutex.h/,$ {
>                 1,/^\(static\|int\|long\)/ {
>                      /^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex);
> 
> } }"  \
>     -e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \
>     -e '/[      ]*cycle_kernel_lock();/d'
> else
>     sed -i -e '/include.*\<smp_lock.h\>/d' ${file}  \
>                 -e '/cycle_kernel_lock()/d'
> fi
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Cc: Takashi Iwai <tiwai@...e.de>

Through a quick look over the patch and the actual driver codes,
I found no obvious problems, so I applied it now to sound git tree.


thanks,

Takashi
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