CONFIG_FORCE_MAX_ZONEORDER settable for all ARM architectures

[Russell King - ARM Linux]

On Fri, Nov 05, 2010 at 09:41:10AM -0400, Daniel Mack wrote:
> on a PXA3xx based platform, we want to allocate 8MByte of physically
> contiguous memory for the framebuffer device.
> 
> However, alloc_pages() fails because MAX_ORDER is hard-coded to 11 for
> this architecture.

Wrong.  If there's an SA1111, it defaults to 9 rather than 11.

> Is there any reason why CONFIG_FORCE_MAX_ZONEORDER is constrained to
> ARCH_SHMOBILE in arch/arm/Kconfig?

It's not.

        int "Maximum zone order" if ARCH_SHMOBILE

means "present the user with this option if ARCH_SHMOBILE != n, otherwise
don't present it to the user but set it anyway".

        range 11 64 if ARCH_SHMOBILE

defines the range when ARCH_SHMOBILE is set.  When it isn't set, there
is no range limitation.

        default "9" if SA1111
        default "11"

So, if SA1111 is set, then it's 9, otherwise it's 11.