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authorDave Hansen <haveblue@us.ibm.com>2005-06-23 00:07:42 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-23 09:45:01 -0700
commit3a9da7655d2d5b7f790a370328cf093440c80496 (patch)
tree29fd39ee7dce0cfb4abc104a8492c22ff7f06111 /mm
parent5b505b90b2d54e526cc8d123bdef3b98c9f0bbc6 (diff)
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[PATCH] create mm/Kconfig for arch-independent memory options
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>
Diffstat (limited to 'mm')
-rw-r--r--mm/Kconfig25
1 files changed, 25 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
new file mode 100644
index 00000000000..69caa9d8674
--- /dev/null
+++ b/mm/Kconfig
@@ -0,0 +1,25 @@
+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
+