This is a note to let you know that I've just added the patch titled vfio/pci: zap_vma_ptes() needs MMU to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: vfio-pci-zap_vma_ptes-needs-mmu.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit bbeeab473127015b6b49ec2bfcd62b91feb4d160 Author: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Date: Sat May 15 12:08:56 2021 -0700 vfio/pci: zap_vma_ptes() needs MMU [ Upstream commit 2a55ca37350171d9b43d561528f23d4130097255 ] zap_vma_ptes() is only available when CONFIG_MMU is set/enabled. Without CONFIG_MMU, vfio_pci.o has build errors, so make VFIO_PCI depend on MMU. riscv64-linux-ld: drivers/vfio/pci/vfio_pci.o: in function `vfio_pci_mmap_open': vfio_pci.c:(.text+0x1ec): undefined reference to `zap_vma_ptes' riscv64-linux-ld: drivers/vfio/pci/vfio_pci.o: in function `.L0 ': vfio_pci.c:(.text+0x165c): undefined reference to `zap_vma_ptes' Fixes: 11c4cd07ba11 ("vfio-pci: Fault mmaps to enable vma tracking") Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Reported-by: kernel test robot <lkp@xxxxxxxxx> Cc: Alex Williamson <alex.williamson@xxxxxxxxxx> Cc: Cornelia Huck <cohuck@xxxxxxxxxx> Cc: kvm@xxxxxxxxxxxxxxx Cc: Jason Gunthorpe <jgg@xxxxxxxxxx> Cc: Eric Auger <eric.auger@xxxxxxxxxx> Message-Id: <20210515190856.2130-1-rdunlap@xxxxxxxxxxxxx> Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index 24ee2605b9f0..0da884bfc7a8 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -1,6 +1,7 @@ config VFIO_PCI tristate "VFIO support for PCI devices" depends on VFIO && PCI && EVENTFD + depends on MMU select VFIO_VIRQFD select IRQ_BYPASS_MANAGER help