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| author | Christoph Lameter <clameter@sgi.com> | 2007-02-10 01:43:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-11 10:51:18 -0800 |
| commit | 4b51d66989218aad731a721b5b28c79bf5388c09 (patch) | |
| tree | 8ff7acbd219f699c20c2f1fd201ffb3db5a64062 /mm/Kconfig | |
| parent | 66701b1499a3ff11882c8c4aef36e8eac86e17b1 (diff) | |
| download | lwn-4b51d66989218aad731a721b5b28c79bf5388c09.tar.gz lwn-4b51d66989218aad731a721b5b28c79bf5388c09.zip | |
[PATCH] optional ZONE_DMA: optional ZONE_DMA in the VM
Make ZONE_DMA optional in core code.
- ifdef all code for ZONE_DMA and related definitions following the example
for ZONE_DMA32 and ZONE_HIGHMEM.
- Without ZONE_DMA, ZONE_HIGHMEM and ZONE_DMA32 we get to a ZONES_SHIFT of
0.
- Modify the VM statistics to work correctly without a DMA zone.
- Modify slab to not create DMA slabs if there is no ZONE_DMA.
[akpm@osdl.org: cleanup]
[jdike@addtoit.com: build fix]
[apw@shadowen.org: Simplify calculation of the number of bits we need for ZONES_SHIFT]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Matthew Wilcox <willy@debian.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 50f7cfc15b78..79360cf519bf 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -161,3 +161,9 @@ config RESOURCES_64BIT default 64BIT help This option allows memory and IO resources to be 64 bit. + +config ZONE_DMA_FLAG + int + default "0" if !ZONE_DMA + default "1" + |