Introduce CONFIG_ZONE_DMA
CONFIG_ZONE_DMA can be defined in two ways depending on how
an architecture handles ISA DMA.
First when CONFIG_GENERIC_ISA_DMA is set by the arch then we know that
the arch needs ZONE_DMA because ISA DMA devices are supported. The arch
would need to be modified in order to allow switching ZONE_DMA off.
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 modified to not depend on ZONE_DMA.
As a result of this patch CONFIG_ZONE_DMA should be defined for every
arch.
Signed-off-by: Christoph Lameter <[email protected]>
Index: linux-2.6.17-mm6/mm/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/mm/Kconfig 2006-07-03 13:47:22.616084772 -0700
+++ linux-2.6.17-mm6/mm/Kconfig 2006-07-03 21:26:49.956038556 -0700
@@ -134,6 +134,10 @@ config SPLIT_PTLOCK_CPUS
default "4096" if PARISC && !PA20
default "4"
+config ZONE_DMA
+ def_bool y
+ depends on GENERIC_ISA_DMA
+
#
# support for page migration
#
Index: linux-2.6.17-mm6/arch/ia64/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/ia64/Kconfig 2006-07-03 21:26:38.944998185 -0700
+++ linux-2.6.17-mm6/arch/ia64/Kconfig 2006-07-03 21:35:54.270151176 -0700
@@ -22,6 +22,10 @@ config 64BIT
bool
default y
+config ZONE_DMA
+ bool
+ default y
+
config MMU
bool
default y
Index: linux-2.6.17-mm6/arch/cris/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/cris/Kconfig 2006-07-03 13:47:12.502452440 -0700
+++ linux-2.6.17-mm6/arch/cris/Kconfig 2006-07-03 21:34:53.678182903 -0700
@@ -9,6 +9,10 @@ config MMU
bool
default y
+config ZONE_DMA
+ bool
+ default y
+
config RWSEM_GENERIC_SPINLOCK
bool
default y
Index: linux-2.6.17-mm6/arch/s390/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/s390/Kconfig 2006-07-03 13:47:13.887132430 -0700
+++ linux-2.6.17-mm6/arch/s390/Kconfig 2006-07-03 21:34:30.527266107 -0700
@@ -7,6 +7,10 @@ config MMU
bool
default y
+config ZONE_DMA
+ bool
+ default y
+
config LOCKDEP_SUPPORT
bool
default y
Index: linux-2.6.17-mm6/arch/xtensa/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/xtensa/Kconfig 2006-07-03 13:47:14.333393893 -0700
+++ linux-2.6.17-mm6/arch/xtensa/Kconfig 2006-07-03 21:37:26.980256509 -0700
@@ -7,6 +7,10 @@ config FRAME_POINTER
bool
default n
+config ZONE_DMA
+ bool
+ default y
+
config XTENSA
bool
default y
Index: linux-2.6.17-mm6/arch/h8300/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/h8300/Kconfig 2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-mm6/arch/h8300/Kconfig 2006-07-03 21:35:38.346328043 -0700
@@ -17,6 +17,10 @@ config SWAP
bool
default n
+config ZONE_DMA
+ bool
+ default y
+
config FPU
bool
default n
Index: linux-2.6.17-mm6/arch/v850/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/v850/Kconfig 2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-mm6/arch/v850/Kconfig 2006-07-03 21:37:04.602729732 -0700
@@ -10,6 +10,9 @@ mainmenu "uClinux/v850 (w/o MMU) Kernel
config MMU
bool
default n
+config ZONE_DMA
+ bool
+ default y
config RWSEM_GENERIC_SPINLOCK
bool
default y
Index: linux-2.6.17-mm6/arch/sh/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/sh/Kconfig 2006-07-03 13:47:13.975017619 -0700
+++ linux-2.6.17-mm6/arch/sh/Kconfig 2006-07-03 21:36:39.118949095 -0700
@@ -14,6 +14,10 @@ config SUPERH
gaming console. The SuperH port has a home page at
<http://www.linux-sh.org/>.
+config ZONE_DMA
+ bool
+ default y
+
config RWSEM_GENERIC_SPINLOCK
bool
default y
Index: linux-2.6.17-mm6/arch/frv/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/frv/Kconfig 2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-mm6/arch/frv/Kconfig 2006-07-03 21:35:16.328153984 -0700
@@ -6,6 +6,10 @@ config FRV
bool
default y
+config ZONE_DMA
+ bool
+ default y
+
config RWSEM_GENERIC_SPINLOCK
bool
default y
Index: linux-2.6.17-mm6/arch/m68knommu/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/m68knommu/Kconfig 2006-07-03 13:47:12.932113368 -0700
+++ linux-2.6.17-mm6/arch/m68knommu/Kconfig 2006-07-03 21:36:19.860370626 -0700
@@ -17,6 +17,10 @@ config FPU
bool
default n
+config ZONE_DMA
+ bool
+ default y
+
config RWSEM_GENERIC_SPINLOCK
bool
default y
-
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