2007-05-04 05:54:39

by Andrew Morton

[permalink] [raw]
Subject: Re: [PATCH 1/5] Power Management: use mutexes instead of semaphores

On Fri, 27 Apr 2007 10:43:22 +0200 Matthias Kaehlcke <[email protected]> wrote:

> the Power Management code uses semaphores as mutexes. use the mutex
> API instead of the (binary) semaphores

I know it's a little thing, but given a choice between

a) changelogs which use capital letters and fullstops and

b) changelogs which do not,

I think a) gives a better result.

I note that none of these patches added a #include <linux/mutex.h>. Each C
file which uses mutexes should do that, rather than relying upon accidental
nested includes. I hope you're checking for that.


2007-05-04 07:05:37

by Matthias Kaehlcke

[permalink] [raw]
Subject: Re: [PATCH 1/5] Power Management: use mutexes instead of semaphores

El Thu, May 03, 2007 at 10:54:32PM -0700 Andrew Morton ha dit:

> On Fri, 27 Apr 2007 10:43:22 +0200 Matthias Kaehlcke <[email protected]> wrote:
>
> > the Power Management code uses semaphores as mutexes. use the mutex
> > API instead of the (binary) semaphores
>
> I know it's a little thing, but given a choice between
>
> a) changelogs which use capital letters and fullstops and
>
> b) changelogs which do not,
>
> I think a) gives a better result.

thanks for your suggestion, i'll take it into account for future patches

> I note that none of these patches added a #include <linux/mutex.h>. Each C
> file which uses mutexes should do that, rather than relying upon accidental
> nested includes. I hope you're checking for that.

initially i added the include line (i think at least one patch still
contains it), but then i realized that in most cases the original code
doesn't include semaphore.h and i (mis-)interpreted that it should be
handled the same way (relying upon nested includes) for mutexes.

do you want me to send you a version of the patches containing the
include?

regards

--
Matthias Kaehlcke
Linux Application Developer
Barcelona

The assumption that what currently exists must necessarily
exist is the acid that corrodes all visionary thinking
.''`.
using free software / Debian GNU/Linux | http://debian.org : :' :
`. `'`
gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-

2007-05-04 07:18:56

by Andrew Morton

[permalink] [raw]
Subject: Re: [PATCH 1/5] Power Management: use mutexes instead of semaphores

On Fri, 4 May 2007 09:08:40 +0200 Matthias Kaehlcke <[email protected]> wrote:

> > I note that none of these patches added a #include <linux/mutex.h>. Each C
> > file which uses mutexes should do that, rather than relying upon accidental
> > nested includes. I hope you're checking for that.
>
> initially i added the include line (i think at least one patch still
> contains it), but then i realized that in most cases the original code
> doesn't include semaphore.h and i (mis-)interpreted that it should be
> handled the same way (relying upon nested includes) for mutexes.
>
> do you want me to send you a version of the patches containing the
> include?

erm, is OK, I'll make the changes.