Mailinglist Archive: opensuse-kernel (109 mails)

[Jean Delvare <jdelvare@xxxxxxx>]

On Sunday 07 March 2010 04:35:58 pm Jan Engelhardt wrote:
> On Sunday 2010-03-07 14:56, Bernhard Walle wrote:
> > So you replaced the old DECLARE_MUTEX() (which is actually a binary
> > semaphore as Jean mentioned) with struct semaphore. Which is not wrong,
> > of course. But it shows that the semaphore was used as mutex, so I don't
> > see a problem with using the new Mutex API as Jean mentioned.
>
> You would have to check whether the sema is held in sleeping, which
> newmutexes are not allowed to.

How that, please? I use "new" mutexes in many drivers, and they do sleep, and 
this has never been a problem, nor has anyone ever told me this was incorrect. 
Care to backup your claim? include/linux/mutex.h doesn't mention sleeping 
constraints at all.

-- 
Jean Delvare
Suse L3
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