Re: [RFC][PATCH] unify all architecture PAGE_SIZE definitions

[Paul Mundt <lethal@linux-sh.org>]

On Thu, Aug 24, 2006 at 04:44:45PM -0700, Dave Hansen wrote:
> This patch unifies all of those definitions.  It defines PAGE_SIZE in
> a single header which gets its definitions from Kconfig.  The new
> Kconfig options mirror what used to be done with #ifdefs and
> arch-specific Kconfig options.  The new Kconfig menu eliminates
> the need for parisc, ia64, and sparc64 to have their own "choice"
> menus for selecting page size.  The help text has been adapted from
> these three architectures, but is now more generic.
> 
I like the idea of asm-generic/page_size.h (though why not just use
asm-generic/page.h?) and ripping that out from the architecture headers,
though the mm/Kconfig bits look like something best left in the
architecture Kconfigs.

PAGE_SHIFT is really the only thing of interest, and that can be handled
without the CONFIG_PAGE_SIZE mess. The architectures that really care
about it can use their current hacks or just check PAGE_SHIFT.