From: Heiko Carstens <[EMAIL PROTECTED]>
Architectures that don't support DMA can say so by adding a
config NO_DMA to their Kconfig file. This will prevent compilation
of some dma specific driver code. Also dma-mapping-broken.h isn't
needed anymore on at least s390.
This avoids compilation and linking of otherwise dead/broken code.
Signed-off-by: Heiko Carstens <[EMAIL PROTECTED]>
---
Other architectures that include dma-mapping-broken.h are
arm26, h8300, m68k, m68knommu and v850. If these could be converted
as well we could get rid of the header file.
arch/s390/Kconfig | 3 +++
drivers/base/Makefile | 4 ++--
include/asm-s390/dma-mapping.h | 2 --
lib/Kconfig | 5 +++++
4 files changed, 10 insertions(+), 4 deletions(-)
Index: linux-2.6/arch/s390/Kconfig
===================================================================
--- linux-2.6.orig/arch/s390/Kconfig
+++ linux-2.6/arch/s390/Kconfig
@@ -44,6 +44,9 @@ config GENERIC_TIME
config NO_IOMEM
def_bool y
+config NO_DMA
+ def_bool y
+
mainmenu "Linux Kernel Configuration"
config S390
Index: linux-2.6/drivers/base/Makefile
===================================================================
--- linux-2.6.orig/drivers/base/Makefile
+++ linux-2.6/drivers/base/Makefile
@@ -2,10 +2,10 @@
obj-y := core.o sys.o bus.o dd.o \
driver.o class.o platform.o \
- cpu.o firmware.o init.o map.o dmapool.o \
- dma-mapping.o devres.o \
+ cpu.o firmware.o init.o map.o devres.o \
attribute_container.o transport_class.o
obj-y += power/
+obj-$(CONFIG_HAS_DMA) += dma-mapping.o dmapool.o
obj-$(CONFIG_ISA) += isa.o
obj-$(CONFIG_FW_LOADER) += firmware_class.o
obj-$(CONFIG_NUMA) += node.o
Index: linux-2.6/include/asm-s390/dma-mapping.h
===================================================================
--- linux-2.6.orig/include/asm-s390/dma-mapping.h
+++ linux-2.6/include/asm-s390/dma-mapping.h
@@ -9,6 +9,4 @@
#ifndef _ASM_DMA_MAPPING_H
#define _ASM_DMA_MAPPING_H
-#include <asm-generic/dma-mapping-broken.h>
-
#endif /* _ASM_DMA_MAPPING_H */
Index: linux-2.6/lib/Kconfig
===================================================================
--- linux-2.6.orig/lib/Kconfig
+++ linux-2.6/lib/Kconfig
@@ -111,4 +111,9 @@ config HAS_IOPORT
depends on HAS_IOMEM && !NO_IOPORT
default y
+config HAS_DMA
+ boolean
+ depends on !NO_DMA
+ default y
+
endmenu
--
Heiko Carstens
Linux on System z Development
IBM Deutschland Entwicklung GmbH
Vorsitzender des Aufsichtsrats: Johann Weihen
Geschaeftsfuehrung : Herbert Kircher
Sitz der Gesellschaft: Boeblingen
Registergericht: Amtsgericht Stuttgart, HRB 243294
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