[PATCH] ARM: stm32: Reduce FORCE_MAX_ZONEORDER to 9

On 08/25/2015 10:36 PM, Arnd Bergmann wrote:

On Tuesday 25 August 2015 22:07:17 Maxime Coquelin wrote:

quoted

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a750c14..57d53af 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig

@@ -1734,7 +1734,7 @@ config FORCE_MAX_ZONEORDER
         int "Maximum zone order" if ARCH_SHMOBILE_LEGACY
         range 11 64 if ARCH_SHMOBILE_LEGACY
         default "12" if SOC_AM33XX
-       default "9" if SA1111 || ARCH_EFM32
+       default "9" if SA1111 || ARCH_EFM32 || ARCH_STM32
         default "11"

This looks wrong now that we can enable multiple ARMV7M platforms
together. In practice it doesn't matter much, because you wouldn't
do that for a real-life system, but out of principle this seems
like something you'd better put into the defconfig file for
both ARCH_EFM32 and ARCH_STM32. We could also think about changing
the default to "9" for any ARM_SINGLE_ARMV7M config and increasing
it again in defconfig for any platform that actually has a lot of
RAM (if any).

Both proposals seem reasonable.
I propose to make this entry configurable in defconfig if ARM_SINGLE_ARMV7M,
keeping the default to 11. Then, in efm32 and stm32 defconfig files, 
select value 9.

Uwe, is it ok for you?

Regards,
Maxime