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authorBart Van Assche <bart.vanassche@sandisk.com>2017-01-20 13:04:06 -0800
committerDoug Ledford <dledford@redhat.com>2017-01-24 12:23:35 -0500
commit7844572c633964c864d9f32dc3f2a8ffe5d70371 (patch)
treea0402ba054805b019692ba5a1e865f6849569957 /lib
parent1eec9e2befd35270b19a91bb633db595dc55975e (diff)
downloadlinux-7844572c633964c864d9f32dc3f2a8ffe5d70371.tar.bz2
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>
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig5
-rw-r--r--lib/Makefile2
2 files changed, 6 insertions, 1 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 260a80e313b9..b6baf0609e8b 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -395,6 +395,11 @@ config HAS_DMA
depends on !NO_DMA
default y
+config DMA_NOOP_OPS
+ bool
+ depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
+ default n
+
config CHECK_SIGNATURE
bool
diff --git a/lib/Makefile b/lib/Makefile
index bc4073a8cd08..ada06d5652e8 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -26,7 +26,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
lib-$(CONFIG_MMU) += ioremap.o
lib-$(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
obj-y += lockref.o