linux-kernel - Re: [PATCH] Convert blackfin to use arch

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Date:	Mon, 20 Jul 2009 04:24:27 -0400
From:	Mike Frysinger <vapier.adi@...il.com>
To:	john stultz <johnstul@...ibm.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	uclinux-dist-devel@...ckfin.uclinux.org
Subject: Re: [PATCH] Convert blackfin to use arch_gettimeoffset()

On Fri, Jul 17, 2009 at 01:33, john stultz wrote:
> On Thu, 2009-07-16 at 22:26 -0400, Mike Frysinger wrote:
>> On Thu, Jul 16, 2009 at 20:25, john stultz wrote:
>> > This patch converts blackfin to use GENERIC_TIME via the arch_getoffset()
>> > infrastructure, reducing the amount of arch specific code we need to
>> > maintain.
>> >
>> > This patch applies on top of Linus' current -git tree (2.6.31-rc3).
>> >
>> > I've taken my best swing at converting this, but I'm not 100% confident
>> > I got it right. My cross-compiler is now out of date (gcc4.2) so I
>> > wasn't able to  check if it compiled. Any assistance from arch
>> > maintainers or testers to get this merged would be great.
>>
>> something seems to be off as the Blackfin defconfig now does:
>>   LD      .tmp_vmlinux1
>> kernel/built-in.o: In function `clocksource_forward_now':
>> kernel/time/timekeeping.c:82: undefined reference to `arch_gettimeoffset'
>> kernel/built-in.o: In function `getnstimeofday':
>> kernel/time/timekeeping.c:119: undefined reference to `arch_gettimeoffset'
>> make: *** [.tmp_vmlinux1] Error 1
>>
>> most likely because the Blackfin time.c is the old stuff
>> (non-clocksource) while time-ts.c is the newer stuff (clocksource) and
>> this change only touches time.c
>
> Ok. So I guess I missed that time.c isn't built if GENERIC_CLOCKEVENTS
> isn't enabled, so ARCH_HAS_GETTIMEOFFSET needs to depend on !
> GENERIC_CLOCKEVENTS.
>
> Hopefully I've got it cleared up now. Let me know if I'm still causing
> trouble.

this one seems to build & boot for GENERIC_CLOCKEVENTS set to y or n.  thanks.
-mike
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