Commit 3a9da7655d2d5b7f790a370328cf093440c80496
Committed by
Linus Torvalds
Linus Torvalds
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5b505b90b2
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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>
Showing 1 changed file with 25 additions and 0 deletions Side-by-side Diff
mm/Kconfig
| 1 | +choice | |
| 2 | + prompt "Memory model" | |
| 3 | + default FLATMEM | |
| 4 | + default SPARSEMEM if ARCH_SPARSEMEM_DEFAULT | |
| 5 | + default DISCONTIGMEM if ARCH_DISCONTIGMEM_DEFAULT | |
| 6 | + | |
| 7 | +config FLATMEM | |
| 8 | + bool "Flat Memory" | |
| 9 | + depends on !ARCH_DISCONTIGMEM_ENABLE || ARCH_FLATMEM_ENABLE | |
| 10 | + help | |
| 11 | + This option allows you to change some of the ways that | |
| 12 | + Linux manages its memory internally. Most users will | |
| 13 | + only have one option here: FLATMEM. This is normal | |
| 14 | + and a correct option. | |
| 15 | + | |
| 16 | + If unsure, choose this option over any other. | |
| 17 | + | |
| 18 | +config DISCONTIGMEM | |
| 19 | + bool "Discontigious Memory" | |
| 20 | + depends on ARCH_DISCONTIGMEM_ENABLE | |
| 21 | + help | |
| 22 | + If unsure, choose "Flat Memory" over this option. | |
| 23 | + | |
| 24 | +endchoice |