path: root/arch/v850/Kconfig
diff options
authorChristoph Lameter <clameter@sgi.com>2007-02-10 01:43:09 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-11 10:51:18 -0800
commit66701b1499a3ff11882c8c4aef36e8eac86e17b1 (patch)
tree7900ced6b590c3cd939bcdc92355ff0a14f856e3 /arch/v850/Kconfig
parent6267276f3fdda9ad0d5ca451bdcbdf42b802d64b (diff)
[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>
Diffstat (limited to 'arch/v850/Kconfig')
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/v850/Kconfig b/arch/v850/Kconfig
index f0d4d72e560..dbfab8fc9b4 100644
--- a/arch/v850/Kconfig
+++ b/arch/v850/Kconfig
@@ -10,6 +10,9 @@ mainmenu "uClinux/v850 (w/o MMU) Kernel Configuration"
config MMU
default n
+config ZONE_DMA
+ bool
+ default y
default y