[PATCH] optional ZONE_DMA: optional ZONE_DMA in the VM
commit4b51d66989218aad731a721b5b28c79bf5388c09
authorChristoph Lameter <clameter@sgi.com>
Sat, 10 Feb 2007 09:43:10 +0000 (10 01:43 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Sun, 11 Feb 2007 18:51:18 +0000 (11 10:51 -0800)
tree8ff7acbd219f699c20c2f1fd201ffb3db5a64062
parent66701b1499a3ff11882c8c4aef36e8eac86e17b1
[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>
include/linux/gfp.h
include/linux/mmzone.h
include/linux/slab_def.h
include/linux/vmstat.h
mm/Kconfig
mm/page_alloc.c
mm/slab.c
mm/vmstat.c