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[PATCH] create mm/Kconfig for arch-independent memory options

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With sparsemem being introduced, we need a central place for new
memory-related .config options: mm/Kconfig.  This allows us to remove many
of the duplicated arch-specific options.

The new option, CONFIG_FLATMEM, is there to enable us to detangle NUMA and
DISCONTIGMEM.  This is a requirement for sparsemem because sparsemem uses
the NUMA code without the presence of DISCONTIGMEM.  The sparsemem patches
use CONFIG_FLATMEM in generic code, so this patch is a requirement before
applying them.

Almost all places that used to do '#ifndef CONFIG_DISCONTIGMEM' should use
'#ifdef CONFIG_FLATMEM' instead.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dave Hansen 2005-06-23 00:07:42 -07:00 committed by Linus Torvalds
parent 5b505b90b2
commit 3a9da7655d
1 changed files with 25 additions and 0 deletions
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choice
prompt "Memory model"
default FLATMEM
default SPARSEMEM if ARCH_SPARSEMEM_DEFAULT
default DISCONTIGMEM if ARCH_DISCONTIGMEM_DEFAULT
config FLATMEM
bool "Flat Memory"
depends on !ARCH_DISCONTIGMEM_ENABLE || ARCH_FLATMEM_ENABLE
help
This option allows you to change some of the ways that
Linux manages its memory internally. Most users will
only have one option here: FLATMEM. This is normal
and a correct option.
If unsure, choose this option over any other.
config DISCONTIGMEM
bool "Discontigious Memory"
depends on ARCH_DISCONTIGMEM_ENABLE
help
If unsure, choose "Flat Memory" over this option.
endchoice