From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
To: Kukjin Kim <kgene.kim@samsung.com>
Cc: Tomasz Figa <t.figa@samsung.com>,
        Krzysztof Kozlowski <k.kozlowski@samsung.com>,
        Russell King <linux@arm.linux.org.uk>,
        linux-arm-kernel@lists.infradead.org,
        linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
        Kyungmin Park <kyungmin.park@samsung.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Sachin Kamat <sachin.kamat@samsung.com>,
        Olof Johansson <olof@lixom.net>
Subject: Re: [PATCH v2] ARM: EXYNOS: Fix build with PM_SLEEP=n
Date: Mon, 21 Jul 2014 13:11:14 +0200
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On Monday, July 21, 2014 12:38:28 PM Bartlomiej Zolnierkiewicz wrote:
> 
> Hi,
> 
> On Saturday, July 19, 2014 04:42:34 AM Kukjin Kim wrote:
> > On 07/16/14 20:59, Tomasz Figa wrote:
> > > Hi Krzysztof,
> > >
> > > On 14.07.2014 09:45, Krzysztof Kozlowski wrote:
> > >> Fix building of exynos defconfig with disabled PM_SLEEP:
> > >> CONFIG_PM_SLEEP=n
> > >> CONFIG_PM_SLEEP_SMP=n
> > >> CONFIG_SUSPEND=n
> > >> by moving functions for power up/down of CPU and cluster to platsmp.c
> > >>
> > >> The build error messages:
> > >> arch/arm/mach-exynos/built-in.o: In function `exynos_boot_secondary':
> > >> arch/arm/mach-exynos/platsmp.c:111: undefined reference to `exynos_cpu_power_state'
> > >> arch/arm/mach-exynos/platsmp.c:112: undefined reference to `exynos_cpu_power_up'
> > >> arch/arm/mach-exynos/platsmp.c:116: undefined reference to `exynos_cpu_power_state'
> > >> make: *** [vmlinux] Error 1
> > >>
> > >> Signed-off-by: Krzysztof Kozlowski<k.kozlowski@samsung.com>
> > >>
> > >> ---
> > >> Changes since v1:
> > >> 1. Use different solution - just move the power up/down functions to a
> > >>     common place instead of adding stubs in common.h. Suggested by Tomasz
> > >>     Figa.
> > >> ---
> > >>   arch/arm/mach-exynos/platsmp.c | 66 ++++++++++++++++++++++++++++++++++++++++++
> > >>   arch/arm/mach-exynos/pm.c      | 66 ------------------------------------------
> > >>   2 files changed, 66 insertions(+), 66 deletions(-)
> > >>
> > >
> > + Bart,
> > 
> > > Reviewed-by: Tomasz Figa<t.figa@samsung.com>
> > >
> > Applied, thanks.
> > 
> > Bart, I think this is better at this moment to fix the build breakage 
> > with disabling PM...if you have any comments, please let me know.
> 
> To fix PM_SLEEP=n build itself (with ARM_EXYNOS_CPUIDLE=n) Krzysztof's
> patch is not enough and patch [1] is also needed (this patch is very
> simple so I think that it is okay for v3.16).

Hmmm, I now see that you've applied Krzysztof's patch for v3.17 not v3.16.

In that case how do you want to deal with PM_SLEEP=n build breakages for
v3.16 and what do you mean with "fix the build breakage with disabling PM"?

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

> For PM_SLEEP=n and ARM_EXYNOS_CPUIDLE=y config more changes are needed
> and they are contained in patch [2] (please note that this patch depends
> on patch [3] from Tomasz Figa which was redone recently into [4] so my
> patch also needs to be refreshed).  However if you think that this would
> result in too much changes for v3.16 kernel we can make ARM_EXYNOS_CPUIDLE
> select (or depend on) PM_SLEEP for now and fix the issue completely later
> in v3.17 kernel.
> 
> [1] "[PATCH 1/2] ARM: EXYNOS: Fix build with PM_SLEEP=n part #2"
> http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg34080.html
> 
> [2] "[PATCH 2/2] ARM: EXYNOS: Fix build with PM_SLEEP=n and ARM_EXYNOS_CPUIDLE=y"
> http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg34081.html
> 
> [3] "[PATCH 5/6] ARM: EXYNOS: Fix suspend/resume sequencies"
> http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg32809.html
> 
> [4] "[PATCH v3] ARM: EXYNOS: Fix suspend/resume sequences"
> http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg34150.html
> 
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics

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