The patch titled
Introduce CONFIG_HAS_DMA
has been added to the -mm tree. Its filename is
introduce-config_has_dma.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Introduce CONFIG_HAS_DMA
From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
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.
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.
Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
"John W. Linville" <linville@xxxxxxxxxxxxx>
Cc: Kyle McMartin <kyle@xxxxxxxxxxxxxxxx>
Cc: <James.Bottomley@xxxxxxxxxxxx>
Cc: Tejun Heo <htejun@xxxxxxxxx>
Cc: Jeff Garzik <jeff@xxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: <geert@xxxxxxxxxxxxxx>
Cc: <zippel@xxxxxxxxxxxxxx>
Cc: <spyro@xxxxxxx>
Cc: <uclinux-v850@xxxxxxxxxxxxx>
Cc: <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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(-)
diff -puN arch/s390/Kconfig~introduce-config_has_dma arch/s390/Kconfig
--- a/arch/s390/Kconfig~introduce-config_has_dma
+++ a/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
diff -puN drivers/base/Makefile~introduce-config_has_dma drivers/base/Makefile
--- a/drivers/base/Makefile~introduce-config_has_dma
+++ a/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
diff -puN include/asm-s390/dma-mapping.h~introduce-config_has_dma include/asm-s390/dma-mapping.h
--- a/include/asm-s390/dma-mapping.h~introduce-config_has_dma
+++ a/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 */
diff -puN lib/Kconfig~introduce-config_has_dma lib/Kconfig
--- a/lib/Kconfig~introduce-config_has_dma
+++ a/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
_
Patches currently in -mm which might be from heiko.carstens@xxxxxxxxxx are
git-s390.patch
introduce-config_has_dma.patch
call-cpu_chain-with-cpu_down_failed-if-cpu_down_prepare-failed.patch
slab-use-cpu_lock_.patch
-
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