# git rev-parse -q --verify ffd0b25ca049a477cb757e5bcf2d5e1664d12e5d^{commit} ffd0b25ca049a477cb757e5bcf2d5e1664d12e5d already have revision, skipping fetch # git checkout -q -f -B kisskb ffd0b25ca049a477cb757e5bcf2d5e1664d12e5d # git clean -qxdf # < git log -1 # commit ffd0b25ca049a477cb757e5bcf2d5e1664d12e5d # Author: Qian Cai # Date: Wed Oct 14 14:28:11 2020 -0400 # # Revert "powerpc/pci: unmap legacy INTx interrupts when a PHB is removed" # # This reverts commit 3a3181e16fbde752007759f8759d25e0ff1fc425 which # causes memory corruptions on POWER9 powernv. eg: # # pci_bus 0035:08: busn_res: [bus 08-0c] is released # ============================================================================= # BUG kmalloc-16 (Tainted: G W O ): Object already free # ----------------------------------------------------------------------------- # Disabling lock debugging due to kernel taint # INFO: Allocated in pcibios_scan_phb+0x104/0x3e0 age=1960714 cpu=4 pid=1 # __slab_alloc+0xa4/0xf0 # __kmalloc+0x294/0x330 # pcibios_scan_phb+0x104/0x3e0 # pcibios_init+0x84/0x124 # do_one_initcall+0xac/0x528 # kernel_init_freeable+0x35c/0x3fc # kernel_init+0x24/0x148 # ret_from_kernel_thread+0x5c/0x80 # INFO: Freed in pcibios_remove_bus+0x70/0x90 age=0 cpu=16 pid=1717146 # kfree+0x49c/0x510 # pcibios_remove_bus+0x70/0x90 # pci_remove_bus+0xe4/0x110 # pci_remove_bus_device+0x74/0x170 # pci_remove_bus_device+0x4c/0x170 # pci_stop_and_remove_bus_device_locked+0x34/0x50 # remove_store+0xc0/0xe0 # dev_attr_store+0x30/0x50 # sysfs_kf_write+0x68/0xb0 # kernfs_fop_write+0x114/0x260 # vfs_write+0xe4/0x260 # ksys_write+0x74/0x130 # system_call_exception+0xf8/0x1d0 # system_call_common+0xe8/0x218 # INFO: Slab 0x0000000099caaf22 objects=178 used=174 fp=0x00000000006a64b0 flags=0x7fff8000000201 # INFO: Object 0x00000000f360132d @offset=30192 fp=0x0000000000000000 # # Signed-off-by: Qian Cai # Acked-by: Oliver O'Halloran # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20201014182811.12027-1-cai@lca.pw # < /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 ffd0b25ca049a477cb757e5bcf2d5e1664d12e5d # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_defconfig # Added to kconfig CONFIG_PPC_E500MC=y # Added to kconfig CONFIG_VIRTUALIZATION=y # Added to kconfig CONFIG_KVM_E500MC=y # Added to kconfig # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig .config:4125:warning: override: reassigning to symbol PPC_E500MC .config:4126:warning: override: reassigning to symbol VIRTUALIZATION # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/include/linux/kernel.h:11, from /kisskb/src/include/linux/list.h:9, from /kisskb/src/include/linux/module.h:12, from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15: /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 22 | #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO) | ^ /kisskb/src/include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: note: in expansion of macro 'IS_ERR_VALUE' 139 | if (IS_ERR_VALUE(fep->ring_mem_addr)) | ^~~~~~~~~~~~ cc1: fatal error: opening output file arch/powerpc/boot/dts/fsl/.mpc8540ads.dtb.dts.tmp: No such file or directory compilation terminated. make[2]: *** [scripts/Makefile.lib:326: arch/powerpc/boot/dts/fsl/mpc8540ads.dtb] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [arch/powerpc/Makefile:296: zImage] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [Makefile:185: __sub-make] Error 2 Command 'make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 # Build took: 0:02:38.566209