Will Deacon 93b90414c3 arm64: mm: Fix initialisation of DMA zones on non-NUMA systems ... John reports that the recently merged commit 1a8e1cef76 ("arm64: use both ZONE_DMA and ZONE_DMA32") breaks the boot on his DB845C board: | Booting Linux on physical CPU 0x0000000000 [0x517f803c] | Linux version 5.4.0-mainline-10675-g957a03b9e38f | Machine model: Thundercomm Dragonboard 845c | [...] | Built 1 zonelists, mobility grouping on. Total pages: -188245 | Kernel command line: earlycon | firmware_class.path=/vendor/firmware/ androidboot.hardware=db845c | init=/init androidboot.boot_devices=soc/1d84000.ufshc | printk.devkmsg=on buildvariant=userdebug root=/dev/sda2 | androidboot.bootdevice=1d84000.ufshc androidboot.serialno=c4e1189c | androidboot.baseband=sda | msm_drm.dsi_display0=dsi_lt9611_1080_video_display: | androidboot.slot_suffix=_a skip_initramfs rootwait ro init=/init | | <hangs indefinitely here> This is because, when CONFIG_NUMA=n, zone_sizes_init() fails to handle memblocks that fall entirely within the ZONE_DMA region and erroneously ends up trying to add a negatively-sized region into the following ZONE_DMA32, which is later interpreted as a large unsigned region by the core MM code. Rework the non-NUMA implementation of zone_sizes_init() so that the start address of the memblock being processed is adjusted according to the end of the previous zone, which is then range-checked before updating the hole information of subsequent zones. Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/lkml/CALAqxLVVcsmFrDKLRGRq7GewcW405yTOxG=KR3csVzQ6bXutkA@mail.gmail.com Fixes: 1a8e1cef76 ("arm64: use both ZONE_DMA and ZONE_DMA32") Reported-by: John Stultz <john.stultz@linaro.org> Tested-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2019-12-04 11:25:20 +00:00
..
boot	ARM: dts: sunxi: Revert phy-names removal for ECHI and OHCI	2019-10-04 14:37:03 +02:00
configs	arm64/ARM: configs: Change CONFIG_REMOTEPROC from m to y	2019-09-30 11:48:00 -07:00
crypto	crypto: arm64/aes-neonbs - implement ciphertext stealing for XTS	2019-09-09 17:35:39 +10:00
include	Merge branches 'for-next/elf-hwcap-docs', 'for-next/smccc-conduit-cleanup', 'for-next/zone-dma', 'for-next/relax-icc_pmr_el1-sync', 'for-next/double-page-fault', 'for-next/misc', 'for-next/kselftest-arm64-signal' and 'for-next/kaslr-diagnostics' into for-next/core	2019-11-08 17:46:11 +00:00
kernel	Merge branches 'for-next/elf-hwcap-docs', 'for-next/smccc-conduit-cleanup', 'for-next/zone-dma', 'for-next/relax-icc_pmr_el1-sync', 'for-next/double-page-fault', 'for-next/misc', 'for-next/kselftest-arm64-signal' and 'for-next/kaslr-diagnostics' into for-next/core	2019-11-08 17:46:11 +00:00
kvm	Merge branches 'for-next/elf-hwcap-docs', 'for-next/smccc-conduit-cleanup', 'for-next/zone-dma', 'for-next/relax-icc_pmr_el1-sync', 'for-next/double-page-fault', 'for-next/misc', 'for-next/kselftest-arm64-signal' and 'for-next/kaslr-diagnostics' into for-next/core	2019-11-08 17:46:11 +00:00
lib	Merge branch 'for-next/atomics' into for-next/core	2019-08-30 12:55:39 +01:00
mm	arm64: mm: Fix initialisation of DMA zones on non-NUMA systems	2019-12-04 11:25:20 +00:00
net	arm64: bpf: optimize modulo operation	2019-09-03 15:44:40 +02:00
xen	xen/efi: have a common runtime setup function	2019-10-02 10:31:07 -04:00
Kbuild	arm64: add arch/arm64/Kbuild	2019-08-21 18:47:15 +01:00
Kconfig	arm64: Kconfig: add a choice for endianness	2019-11-14 14:39:03 +00:00
Kconfig.debug	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Kconfig.platforms	arm64: exynos: Enable exynos-chipid driver	2019-09-04 22:43:26 +02:00
Makefile	arm64: implement ftrace with regs	2019-11-06 14:17:35 +00:00