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@xxxxxxxxxxx> Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx> Cc: Joerg Roedel <jroedel@xxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Michael S. Tsirkin <mst@xxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> --- arch/m32r/Kconfig | 1 + arch/s390/Kconfig | 1 + lib/Kconfig | 5 +++++ lib/Makefile | 2 +- 4 files changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig index d227a6988d6b..95474460b367 100644 --- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -18,6 +18,7 @@ config M32R select MODULES_USE_ELF_RELA select HAVE_DEBUG_STACKOVERFLOW select CPU_NO_EFFICIENT_FFS + select DMA_NOOP_OPS config SBUS bool diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index c6722112527d..38ad42358c41 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -137,6 +137,7 @@ config S390 select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_API_DEBUG select HAVE_DMA_CONTIGUOUS + select DMA_NOOP_OPS select HAVE_DYNAMIC_FTRACE select HAVE_DYNAMIC_FTRACE_WITH_REGS select HAVE_EFFICIENT_UNALIGNED_ACCESS 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 -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
