The patch titled
Subject: udmabuf: add CONFIG_MMU dependency
has been added to the -mm mm-unstable branch. Its filename is
udmabuf-use-vmf_insert_pfn-and-vm_pfnmap-for-handling-mmap-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/udmabuf-use-vmf_insert_pfn-and-vm_pfnmap-for-handling-mmap-fix.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: udmabuf: add CONFIG_MMU dependency
Date: Tue, 28 May 2024 15:31:31 +0200
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'
Link: https://lkml.kernel.org/r/20240528133138.2237237-1-arnd@xxxxxxxxxx
Fixes: f7254e043ff1 ("udmabuf: use vmf_insert_pfn and VM_PFNMAP for handling mmap")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Cc: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/dma-buf/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/dma-buf/Kconfig~udmabuf-use-vmf_insert_pfn-and-vm_pfnmap-for-handling-mmap-fix
+++ a/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.
_
Patches currently in -mm which might be from arnd@xxxxxxxx are
udmabuf-use-vmf_insert_pfn-and-vm_pfnmap-for-handling-mmap-fix.patch
