Christoph Lameter 5ac6da669e [PATCH] Set CONFIG_ZONE_DMA for arches with GENERIC_ISA_DMA ... As Andi pointed out: CONFIG_GENERIC_ISA_DMA only disables the ISA DMA channel management. Other functionality may still expect GFP_DMA to provide memory below 16M. So we need to make sure that CONFIG_ZONE_DMA is set independent of CONFIG_GENERIC_ISA_DMA. Undo the modifications to mm/Kconfig where we made ZONE_DMA dependent on GENERIC_ISA_DMA and set theses explicitly in each arches Kconfig. Reviews must occur for each arch in order to determine if ZONE_DMA can be switched off. It can only be switched off if we know that all devices supported by a platform are capable of performing DMA transfers to all of memory (Some arches already support this: uml, avr32, sh sh64, parisc and IA64/Altix). In order to switch ZONE_DMA off conditionally, one would have to establish a scheme by which one can assure that no drivers are enabled that are only capable of doing I/O to a part of memory, or one needs to provide an alternate means of performing an allocation from a specific range of memory (like provided by alloc_pages_range()) and insure that all drivers use that call. In that case the arches alloc_dma_coherent() may need to be modified to call alloc_pages_range() instead of relying on GFP_DMA. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-02-11 10:51:19 -08:00
..
arc	[MIPS] Use ARRAY_SIZE macro when appropriate	2007-02-06 16:53:19 +00:00
au1000	[MIPS] PB1100: Fix pile of warnings	2007-02-06 16:53:20 +00:00
basler/excite	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
boot	Add .gitignore files for MIPS.	2005-11-07 18:05:37 +00:00
cobalt	[MIPS] prom_free_prom_memory cleanup	2007-02-06 16:53:09 +00:00
configs	[MIPS] Malta: Resurrect MTD support for onboard flash.	2006-12-12 01:46:24 +00:00
ddb5xxx	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
dec	[TC] TURBOchannel support for the DECstation	2007-02-09 16:23:16 +00:00
emma2rh	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
gt64120	[MIPS] Remove superfluous "ifdef CONFIG_KGDB".	2007-02-06 16:53:17 +00:00
jazz	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
jmr3927	[MIPS] Use ARRAY_SIZE macro when appropriate	2007-02-06 16:53:19 +00:00
kernel	[APM] MIPS: Convert to use shared APM emulation.	2007-02-09 17:08:58 +00:00
lasat	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
lib	[MIPS] Fix warnings in run_uncached on 32bit kernel	2007-02-06 16:53:24 +00:00
lib-32	[MIPS] Unify memset.S	2007-02-06 16:53:12 +00:00
lib-64	[MIPS] Unify memset.S	2007-02-06 16:53:12 +00:00
math-emu	[MIPS] Make sure cpu_has_fpu is used only in atomic context	2006-10-09 23:20:48 +01:00
mips-boards	[MIPS] Use ARRAY_SIZE macro when appropriate	2007-02-06 16:53:19 +00:00
mm	[MIPS] Move some kernel globals from asm file to C file.	2007-02-06 16:53:16 +00:00
momentum	[MIPS] Jaguar ATX: Fix large number of warnings.	2007-02-06 16:53:22 +00:00
oprofile	[MIPS] Do not allow oprofile to be enabled on SMTC.	2007-02-06 16:53:17 +00:00
pci	[MIPS] Use ARRAY_SIZE macro when appropriate	2007-02-06 16:53:19 +00:00
philips/pnx8550	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
pmc-sierra	[MIPS] Yosemite: Fix missing parens in SERIAL_READ_1 macro	2007-02-06 16:53:25 +00:00
qemu	[MIPS] prom_free_prom_memory cleanup	2007-02-06 16:53:09 +00:00
sgi-ip22	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
sgi-ip27	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
sgi-ip32	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
sibyte	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
sni	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
tx4927	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
tx4938	[MIPS] use name instead of typename for each irq_chip	2007-02-06 16:53:14 +00:00
vr41xx	[MIPS] vr41xx: Use symbolic names for IRQ numers	2007-02-06 16:53:15 +00:00
defconfig	[MIPS] Rename SNI_RM200_PCI to just SNI_RM preparing for more RM machines	2006-12-09 01:03:58 +00:00
Kconfig	[PATCH] Set CONFIG_ZONE_DMA for arches with GENERIC_ISA_DMA	2007-02-11 10:51:19 -08:00
Kconfig.debug	[MIPS] Fix some whitespace damage	2007-02-06 16:53:18 +00:00
Makefile	[MIPS] There is no __GNUC_MAJOR__	2007-01-24 19:23:21 +00:00