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lib/dma-noop: Only build dma_noop_ops for s390 and m32r 

Reduce the kernel size by only building dma_noop_ops for those
architectures that actually use it. This was suggested by
Christoph Hellwig.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2017-01-20 13:04:06 -08:00 committed by Doug Ledford
parent 1eec9e2bef
commit 7844572c63
4 changed files with 8 additions and 1 deletions
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1
arch/m32r/Kconfig
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@ -18,6 +18,7 @@ config M32R
select MODULES_USE_ELF_RELA select MODULES_USE_ELF_RELA
select HAVE_DEBUG_STACKOVERFLOW select HAVE_DEBUG_STACKOVERFLOW
select CPU_NO_EFFICIENT_FFS select CPU_NO_EFFICIENT_FFS
select DMA_NOOP_OPS
config SBUS config SBUS
bool bool

1
arch/s390/Kconfig
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@ -137,6 +137,7 @@ config S390
select HAVE_DEBUG_KMEMLEAK select HAVE_DEBUG_KMEMLEAK
select HAVE_DMA_API_DEBUG select HAVE_DMA_API_DEBUG
select HAVE_DMA_CONTIGUOUS select HAVE_DMA_CONTIGUOUS
select DMA_NOOP_OPS
select HAVE_DYNAMIC_FTRACE select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS select HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_EFFICIENT_UNALIGNED_ACCESS select HAVE_EFFICIENT_UNALIGNED_ACCESS

5
lib/Kconfig
View File

@ -395,6 +395,11 @@ config HAS_DMA
depends on !NO_DMA depends on !NO_DMA
default y default y
config DMA_NOOP_OPS
bool
depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
default n
config CHECK_SIGNATURE config CHECK_SIGNATURE
bool bool

2
lib/Makefile
View File

@ -26,7 +26,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
lib-$(CONFIG_MMU) += ioremap.o lib-$(CONFIG_MMU) += ioremap.o
lib-$(CONFIG_SMP) += cpumask.o lib-$(CONFIG_SMP) += cpumask.o
lib-$(CONFIG_HAS_DMA) += dma-noop.o lib-$(CONFIG_DMA_NOOP_OPS) += dma-noop.o
lib-y += kobject.o klist.o lib-y += kobject.o klist.o
obj-y += lockref.o obj-y += lockref.o