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Subject[patch 2/4] x86: only compile 8237A if CONFIG_ISA_DMA_API is enabled
8237A utilizes the interface provided by CONFIG_ISA_DMA_API, specifically
claim_dma_lock() and release_dma_lock(). Thus, there's a strict
dependency on the config option and the module should only be loaded if
the kernel supports ISA-style DMA.

Signed-off-by: David Rientjes <rientjes@google.com>
---
arch/x86/kernel/Makefile | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -41,12 +41,13 @@ obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o
obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o
obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o
obj-y += bootflag.o e820.o
-obj-y += pci-dma.o quirks.o i8237.o topology.o kdebugfs.o
+obj-y += pci-dma.o quirks.o topology.o kdebugfs.o
obj-y += alternative.o i8253.o pci-nommu.o hw_breakpoint.o
obj-y += tsc.o io_delay.o rtc.o
obj-y += pci-iommu_table.o
obj-y += resource.o

+obj-$(CONFIG_ISA_DMA_API) += i8237.o
obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o
obj-y += process.o
obj-y += i387.o xsave.o

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