linux/arch/s390
Christoph Lameter 66701b1499 [PATCH] optional ZONE_DMA: introduce CONFIG_ZONE_DMA
This patch simply defines CONFIG_ZONE_DMA for all arches.  We later do special
things with CONFIG_ZONE_DMA after the VM and an arch are prepared to work
without ZONE_DMA.

CONFIG_ZONE_DMA can be defined in two ways depending on how an architecture
handles ISA DMA.

First if CONFIG_GENERIC_ISA_DMA is set by the arch then we know that the arch
needs ZONE_DMA because ISA DMA devices are supported.  We can catch this in
mm/Kconfig and do not need to modify arch code.

Second, arches may use ZONE_DMA in an unknown way.  We set CONFIG_ZONE_DMA for
all arches that do not set CONFIG_GENERIC_ISA_DMA in order to insure backwards
compatibility.  The arches may later undefine ZONE_DMA if their arch code has
been verified to not depend on ZONE_DMA.

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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 10:51:18 -08:00
..
appldata [S390] Get rid of a lot of sparse warnings. 2007-02-05 21:16:47 +01:00
boot [PATCH] use ${CROSS_COMPILE}installkernel in arch/*/boot/install.sh 2005-06-23 09:45:07 -07:00
crypto [S390] Support for s390 Pseudo Random Number Generator 2007-02-05 21:18:22 +01:00
hypfs [S390] Hypervisor filesystem (s390_hypfs) for z/VM 2007-02-05 21:18:29 +01:00
kernel [S390] Avoid excessive inlining. 2007-02-05 21:18:53 +01:00
lib [S390] Avoid excessive inlining. 2007-02-05 21:18:53 +01:00
math-emu [S390] Calibrate delay and bogomips. 2007-02-05 21:18:31 +01:00
mm [S390] Avoid excessive inlining. 2007-02-05 21:18:53 +01:00
oprofile [PATCH] s390: add oprofile callgraph support 2006-01-06 08:33:50 -08:00
defconfig [S390]: Add AF_IUCV socket support 2007-02-08 13:51:54 -08:00
Kconfig [PATCH] optional ZONE_DMA: introduce CONFIG_ZONE_DMA 2007-02-11 10:51:18 -08:00
Kconfig.debug [PATCH] lockdep: irqtrace subsystem, s390 support 2006-07-03 15:27:03 -07:00
Makefile [S390] set KBUILD_IMAGE. 2006-12-04 15:40:49 +01:00