From: Arnd Bergmann <arnd@xxxxxxxx>
There is no !CONFIG_MMU version of vmf_insert_pfn():
arm-linux-gnueabi-ld: drivers/dma-buf/udmabuf.o: in function `udmabuf_vm_fault':
udmabuf.c:(.text+0xaa): undefined reference to `vmf_insert_pfn'
Fixes: f7254e043ff1 ("udmabuf: use vmf_insert_pfn and VM_PFNMAP for handling mmap")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/dma-buf/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig
index e4dc53a36428..b46eb8a552d7 100644
--- a/drivers/dma-buf/Kconfig
+++ b/drivers/dma-buf/Kconfig
@@ -35,6 +35,7 @@ config UDMABUF
default n
depends on DMA_SHARED_BUFFER
depends on MEMFD_CREATE || COMPILE_TEST
+ depends on MMU
help
A driver to let userspace turn memfd regions into dma-bufs.
Qemu can use this to create host dmabufs for guest framebuffers.
--
2.39.2
