The quilt patch titled Subject: udmabuf: add CONFIG_MMU dependency has been removed from the -mm tree. Its filename was udmabuf-add-config_mmu-dependency.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Arnd Bergmann <arnd@xxxxxxxx> Subject: udmabuf: add CONFIG_MMU dependency Date: Sun, 23 Jun 2024 23:36:12 -0700 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/20240624063952.1572359-5-vivek.kasireddy@xxxxxxxxx Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Acked-by: David Hildenbrand <david@xxxxxxxxxx> Acked-by: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> Cc: Dave Airlie <airlied@xxxxxxxxxx> Cc: Dongwon Kim <dongwon.kim@xxxxxxxxx> Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: Jason Gunthorpe <jgg@xxxxxxxxxx> Cc: Junxiao Chang <junxiao.chang@xxxxxxxxx> Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx> Cc: Oscar Salvador <osalvador@xxxxxxx> Cc: Peter Xu <peterx@xxxxxxxxxx> Cc: Shuah Khan <shuah@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/dma-buf/Kconfig | 1 + 1 file changed, 1 insertion(+) --- a/drivers/dma-buf/Kconfig~udmabuf-add-config_mmu-dependency +++ 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