[PATCH] [RFC] ARM: compile fix for DEBUG_LL=y && MMU=n

[Uwe Kleine-König]

On Wed, Jan 16, 2013 at 01:17:20PM -0600, Rob Herring wrote:
> On 01/16/2013 08:32 AM, Uwe Kleine-König wrote:
> > debug_ll_addr is only used on machines with an MMU so it can be #ifdef'ed
> > out safely. This fixes:
> > 
> > arch/arm/kernel/debug.S: Assembler messages:
> > arch/arm/kernel/debug.S:104: Error: too many positional arguments
> > 
> > Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
> > Cc: Rob Herring <rob.herring at calxeda.com>
> > Cc: Stephen Warren <swarren at nvidia.com>
> > Cc: Olof Johansson <olof at lixom.net>
> > ---
> > The obvious alternative fix is to make addruart on !MMU take 3
> > arguments, too.
> 
> We never envision a need to get the uart address from C code on !MMU?
On MMU addruart takes 3 arguments: physical address output, virtual
address output and a tmp. On !MMU physical == virtual, so only one
register for the address is needed.

(BTW, it was commit 639da5e (ARM: add an extra temp register to the low
level debugging addruart macro) that only changed the MMU variants of
addruart.)
 
Best regards
Uwe

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