[PATCH] ARM: fix exynos randconfig build error

[Russell King - ARM Linux]

On Tue, Mar 03, 2015 at 01:44:34PM +0100, Bartlomiej Zolnierkiewicz wrote:
> 
> Hi,
> 
> On Tuesday, March 03, 2015 04:40:02 AM Kukjin Kim wrote:
> > On 02/27/15 06:30, Kukjin Kim wrote:
> > > On 02/25/15 20:46, Krzysztof Kozlowski wrote:
> > >> 2015-02-25 12:26 GMT+01:00 Russell King <rmk+kernel at arm.linux.org.uk>:
> > >>> The following error was observed with SMP=n in v4.0-rc1:
> > >>>
> > >>> arch/arm/mach-exynos/pm.c: In function 'exynos_cpu0_enter_aftr':
> > >>> arch/arm/mach-exynos/pm.c:246:4: error: implicit declaration of function 'arch_send_wakeup_ipi_mask' [-Werror=implicit-function-declaration]
> > >>>
> > >>> As the code unconditionally calls a function only available with SMP=y,
> > >>> make the Exynos PM support depend on SMP.
> > >>>
> > >>> Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
> > >>
> > >> Hi,
> > >>
> > >> Thanks for the patch but this already waits for Kukjin top be picked
> > >> up. The first patch was similar to yours (adds dependency on SMP),
> > >> sent on 4th of February:
> > >> https://patchwork.ozlabs.org/patch/436231/
> > >>
> > >> But later Bartlomiej fixed this in other way (allowing to use cpuidle
> > >> on non-SMP):
> > >> https://patchwork.ozlabs.org/patch/436445/
> > >>
> > >> Unfortunately none of them were picked up.
> > >>
> > > I've missed the fix, sorry.
> > > 
> > > BTW, as you know, all of exynos SoCs are based on SMP so generally (in
> > > normal case) there is no reason to use non-SMP on exynos
> > > platforms...even though I understand the build error should be fixed...
> > > 
> > > Anyway, I'll have a look Bart's patch and Russell's fix in this weekend.
> > > 
> > 
> > Firstly, let me take rmk's patch for the randconfig build error...BTW
> 
> What is wrong with picking my patch instead?  It is non-invasive and fixes
> cpuidle support on UP (which is a regression from previous kernels)?
> 
> https://lkml.org/lkml/2015/2/4/521
> 
> > I'm still wondering exynos stuff needs to support non-SMP and need to
> > think more about its usefulness?...
> 
> Currently UP is supported and at least I find it useful for testing/debug
> purposes.  If you want to to make Exynos SMP only thats OK but it should
> be done globally for Exynos arch support not just for cpuidle support.

Has either of these happened yet?  I don't see either in arm-soc.

(lkml.org seems to be - as seems typical - having problems.  The above
URL now returns a blank message.)

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