diff options
| author | Christoph Lameter <clameter@sgi.com> | 2007-02-10 01:43:09 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-11 10:51:18 -0800 |
| commit | 66701b1499a3ff11882c8c4aef36e8eac86e17b1 (patch) | |
| tree | 7900ced6b590c3cd939bcdc92355ff0a14f856e3 | |
| parent | 6267276f3fdda9ad0d5ca451bdcbdf42b802d64b (diff) | |
| download | lwn-66701b1499a3ff11882c8c4aef36e8eac86e17b1.tar.gz lwn-66701b1499a3ff11882c8c4aef36e8eac86e17b1.zip | |
[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>
| -rw-r--r-- | arch/cris/Kconfig | 4 | ||||
| -rw-r--r-- | arch/frv/Kconfig | 4 | ||||
| -rw-r--r-- | arch/h8300/Kconfig | 4 | ||||
| -rw-r--r-- | arch/ia64/Kconfig | 4 | ||||
| -rw-r--r-- | arch/m68knommu/Kconfig | 4 | ||||
| -rw-r--r-- | arch/s390/Kconfig | 4 | ||||
| -rw-r--r-- | arch/v850/Kconfig | 3 | ||||
| -rw-r--r-- | arch/xtensa/Kconfig | 4 | ||||
| -rw-r--r-- | mm/Kconfig | 4 |
9 files changed, 35 insertions, 0 deletions
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig index 3474309e049c..e3db1427dbe5 100644 --- a/arch/cris/Kconfig +++ b/arch/cris/Kconfig @@ -9,6 +9,10 @@ config MMU bool default y +config ZONE_DMA + bool + default y + config RWSEM_GENERIC_SPINLOCK bool default y diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig index 7561d7b72e75..cea237413aa2 100644 --- a/arch/frv/Kconfig +++ b/arch/frv/Kconfig @@ -6,6 +6,10 @@ config FRV bool default y +config ZONE_DMA + bool + default y + config RWSEM_GENERIC_SPINLOCK bool default y diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 34a84bc4baf5..146eb28f6225 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -17,6 +17,10 @@ config SWAP bool default n +config ZONE_DMA + bool + default y + config FPU bool default n diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index f1d2899e9a62..549ead597934 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -24,6 +24,10 @@ config 64BIT bool default y +config ZONE_DMA + bool + default y + config MMU bool default y diff --git a/arch/m68knommu/Kconfig b/arch/m68knommu/Kconfig index 25993c2a8fbb..c5fc5406dad0 100644 --- a/arch/m68knommu/Kconfig +++ b/arch/m68knommu/Kconfig @@ -17,6 +17,10 @@ config FPU bool default n +config ZONE_DMA + bool + default y + config RWSEM_GENERIC_SPINLOCK bool default y diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index eaed402ad346..c64973004261 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -7,6 +7,10 @@ config MMU bool default y +config ZONE_DMA + bool + default y + config LOCKDEP_SUPPORT bool default y diff --git a/arch/v850/Kconfig b/arch/v850/Kconfig index f0d4d72e560f..dbfab8fc9b49 100644 --- a/arch/v850/Kconfig +++ b/arch/v850/Kconfig @@ -10,6 +10,9 @@ mainmenu "uClinux/v850 (w/o MMU) Kernel Configuration" config MMU bool default n +config ZONE_DMA + bool + default y config RWSEM_GENERIC_SPINLOCK bool default y diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 2e74cb0b7807..7c99d518e49e 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -7,6 +7,10 @@ config FRAME_POINTER bool default n +config ZONE_DMA + bool + default y + config XTENSA bool default y diff --git a/mm/Kconfig b/mm/Kconfig index db7c55de92cd..50f7cfc15b78 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -139,6 +139,10 @@ 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 # |