linux-kernel - Re: [PATCH 4/8] ARM: OMAP: build mach-omap code only if needed

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Date:	Mon, 8 Jul 2013 05:00:48 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...radead.org,
	arm@...nel.org
Subject: Re: [PATCH 4/8] ARM: OMAP: build mach-omap code only if needed

* Arnd Bergmann <arnd@...db.de> [130705 09:28]:
> If we build a kernel with CONFIG_ARCH_OMAP2PLUS enabled but all of the
> individual SoCs disabled, we run into a large number of link errors
> because if incorrect dependencies:
> 
> arch/arm/mach-omap2/built-in.o: In function `_add_initiator_dep':
> arch/arm/mach-omap2/omap_hwmod.c:691: undefined reference to `clkdm_add_sleepdep' arch/arm/mach-omap2/built-in.o: In function `_del_initiator_dep':
> arch/arm/mach-omap2/omap_hwmod.c:720: undefined reference to `clkdm_del_sleepdep' arch/arm/mach-omap2/built-in.o: In function `_enable':
> arch/arm/mach-omap2/omap_hwmod.c:2145: undefined reference to `clkdm_in_hwsup'
> arch/arm/mach-omap2/omap_hwmod.c:2147: undefined reference to `clkdm_hwmod_enable'
> arch/arm/mach-omap2/omap_hwmod.c:2191: undefined reference to `clkdm_hwmod_disable'
> arch/arm/mach-omap2/omap_hwmod.c:2146: undefined reference to `clkdm_missing_idle_reporting' arch/arm/mach-omap2/built-in.o: In function `_idle':
> arch/arm/mach-omap2/omap_hwmod.c:2235: undefined reference to `clkdm_hwmod_disable' arch/arm/mach-omap2/built-in.o: In function `_shutdown':
> arch/arm/mach-omap2/omap_hwmod.c:2338: undefined reference to `clkdm_hwmod_disable' arch/arm/mach-omap2/built-in.o: In function `omap_hwmod_get_context_loss_count':
> arch/arm/mach-omap2/omap_hwmod.c:4071: undefined reference to `pwrdm_get_context_loss_count' arch/arm/mach-omap2/built-in.o: In function `omap_pm_clkdms_setup':
> arch/arm/mach-omap2/pm.c:114: undefined reference to `clkdm_allow_idle'
> arch/arm/mach-omap2/pm.c:117: undefined reference to `clkdm_sleep' arch/arm/mach-omap2/built-in.o: In function `omap2_common_pm_late_init':
> arch/arm/mach-omap2/pm.c:294: undefined reference to `omap_voltage_late_init' arch/arm/mach-omap2/built-in.o: In function `omap2_gpio_dev_init':
> arch/arm/mach-omap2/gpio.c:133: undefined reference to `pwrdm_can_ever_lose_context'
> 
> We can avoid this if we make CONFIG_ARCH_OMAP2PLUS a silent option that
> gets enabled any time that one of the SoC versions is enabled.
> 
> Cc: Tony Lindgren <tony@...mide.com>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Sounds like there's some issue as noted by Olof, but the
patch is good in general:

Acked-by: Tony Lindgren <tony@...mide.com>
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