Re: [PATCH-V2 3/4] ARM: OMAP2+: CLEANUP: Remove unnecessary ifdef around __omap2_set_globals

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"Hiremath, Vaibhav" <hvaibhav@xxxxxx> writes:

> On Fri, May 11, 2012 at 03:09:39, Hilman, Kevin wrote:
>> "Hiremath, Vaibhav" <hvaibhav@xxxxxx> writes:
>> 
>> > On Wed, May 09, 2012 at 04:08:09, Hilman, Kevin wrote:
>> >> Vaibhav Hiremath <hvaibhav@xxxxxx> writes:
>> >> 
>> >> > The function __omap2_set_globals() can be common across all
>> >> > platforms/architectures, even in case of omap4, internally it
>> >> > calls same set of functions as in __omap2_set_globals() function
>> >> > (except for sdrc).
>> >> 
>> >> OK so far.
>> >> 
>> >> > This patch adds new config flag SOC_HAS_OMAP2_SDRC to handle sdrc,
>> >> > so that we can reuse same function across omap2/3/4...
>> >> 
>> >> But what happens when a single kernel is built that has support for an
>> >> SoC with an SDRC (OMAP4) and one that doesn't (AM33xx)?
>> >> 
>> >
>> > As such Nothing...I looking into this direction while implementing.
>> >
>> > In that case, sdrc.c file will be compiled in and execution will jump to
>> > omap2_set_globals_sdrc(). But inside this function, we are already checking 
>> > whether the omap2_globals->sdrc and omap2_globals->sms for NULL and then use 
>> > it.
>> >
>> > And function omap2_sdrc_init() is also depends on machine, so in case of
>> > Am33xx, it won't get into sdrc execution at all. And in case of omap4, it 
>> > will.
>> 
>> Then why bother with the #ifdef at all?
>> 
>> If it already safe to call on all SoCs, just get rid of the #ifdef all
>> together.
>> 
>
> Kevin,
>
> sdrc.o target gets built only as "omap-2-3-common", this will not get built 
> for omap4, am33xx, ti81xx, etc...

OK, I see what you mean now.  I was confusing because this patch doesn't
touch sdrc.c, or the Makefile for sdrc.c.

> So in order to avoid build break, you have to have some mechanism, and
> that's where we need to create config option dependent on platform.

That being the case, for readability sake, I suggest you change the
Makefile to use the new config option for sdrc.c as well.

Kevin

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