From: Johannes Berg Date: Mon, 28 Mar 2022 07:46:25 +0000 (+0200) Subject: um: Use asm-generic/dma-mapping.h X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=365719035526e8eda214a1cedb2e1c96e969a0d7;p=linux.git um: Use asm-generic/dma-mapping.h If DMA (PCI over virtio) is enabled, then some drivers may enable CONFIG_DMA_OPS as well, and then we pull in the x86 definition of get_arch_dma_ops(), which uses the dma_ops symbol, which isn't defined. Since we don't have real DMA ops nor any kind of IOMMU fix this in the simplest possible way: pull in the asm-generic file instead of inheriting the x86 one. It's not clear why those drivers that do (e.g. VDPA) "select DMA_OPS", and if they'd even work with this, but chances are nobody will be wanting to do that anyway, so fixing the build failure is good enough. Reported-by: Randy Dunlap Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver") Signed-off-by: Johannes Berg Tested-by: Randy Dunlap Acked-by: Randy Dunlap Cc: stable@vger.kernel.org Signed-off-by: Richard Weinberger --- diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild index f1f3f52f1e9cc..b2d834a29f3a9 100644 --- a/arch/um/include/asm/Kbuild +++ b/arch/um/include/asm/Kbuild @@ -4,6 +4,7 @@ generic-y += bug.h generic-y += compat.h generic-y += current.h generic-y += device.h +generic-y += dma-mapping.h generic-y += emergency-restart.h generic-y += exec.h generic-y += extable.h