[RFC,PATCH 1/2] Add a common struct clk

Lothar Waßmann LW at KARO-electronics.de
Fri Jun 11 05:23:56 EDT 2010


Hi,

> > Using a mutex in clk_enable()/clk_disable() is a bad idea, since that
> > makes it impossible to call those functions in interrupt context.
> 
> Do we do this at the moment? I know at least one implementation of clk_enable 
> uses a mutex for locking.
> 
You are probably talking about the Freescale i.MX51 kernel, that won't
even boot, if you enable CONFIG_DEBUG_KERNEL, CONFIG_DEBUG_SPINLOCK,
CONFIG_DEBUG_LOCKDEP and CONFIG_DEBUG_SPINLOCK_SLEEP.
The mutex in the clock implementation is one of the reasons.


Lothar Waßmann
-- 
___________________________________________________________

Ka-Ro electronics GmbH | Pascalstraße 22 | D - 52076 Aachen
Phone: +49 2408 1402-0 | Fax: +49 2408 1402-10
Geschäftsführer: Matthias Kaussen
Handelsregistereintrag: Amtsgericht Aachen, HRB 4996

www.karo-electronics.de | info at karo-electronics.de
___________________________________________________________



More information about the linux-arm-kernel mailing list