# 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-8.1.0-nolibc/m68k-linux/bin/m68k-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux-ld --version # < git log --format=%s --max-count=1 ffd0b25ca049a477cb757e5bcf2d5e1664d12e5d # < make -s -j 120 ARCH=m68k O=/kisskb/build/powerpc-next_m68k-defconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux- defconfig # make -s -j 120 ARCH=m68k O=/kisskb/build/powerpc-next_m68k-defconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux- /kisskb/src/arch/m68k/mvme147/config.c: In function 'mvme147_hwclk': /kisskb/src/arch/m68k/mvme147/config.c:174:2: warning: #warning check me! [-Wcpp] #warning check me! ^~~~~~~ /kisskb/src/arch/m68k/mvme16x/config.c: In function 'mvme16x_hwclk': /kisskb/src/arch/m68k/mvme16x/config.c:439:2: warning: #warning check me! [-Wcpp] #warning check me! ^~~~~~~ In file included from /kisskb/src/drivers/net/ethernet/8390/xsurf100.c:48: /kisskb/src/drivers/net/ethernet/8390/lib8390.c:988:27: warning: '____alloc_ei_netdev' defined but not used [-Wunused-function] static struct net_device *____alloc_ei_netdev(int size) ^~~~~~~~~~~~~~~~~~~ /kisskb/src/drivers/net/ethernet/8390/lib8390.c:950:13: warning: '__ei_set_multicast_list' defined but not used [-Wunused-function] static void __ei_set_multicast_list(struct net_device *dev) ^~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/drivers/net/ethernet/8390/lib8390.c:850:33: warning: '__ei_get_stats' defined but not used [-Wunused-function] static struct net_device_stats *__ei_get_stats(struct net_device *dev) ^~~~~~~~~~~~~~ /kisskb/src/drivers/net/ethernet/8390/lib8390.c:509:13: warning: '__ei_poll' defined but not used [-Wunused-function] static void __ei_poll(struct net_device *dev) ^~~~~~~~~ /kisskb/src/drivers/net/ethernet/8390/lib8390.c:300:20: warning: '__ei_start_xmit' defined but not used [-Wunused-function] static netdev_tx_t __ei_start_xmit(struct sk_buff *skb, ^~~~~~~~~~~~~~~ /kisskb/src/drivers/net/ethernet/8390/lib8390.c:254:13: warning: '__ei_tx_timeout' defined but not used [-Wunused-function] static void __ei_tx_timeout(struct net_device *dev, unsigned int txqueue) ^~~~~~~~~~~~~~~ /kisskb/src/drivers/net/ethernet/8390/lib8390.c:230:12: warning: '__ei_close' defined but not used [-Wunused-function] static int __ei_close(struct net_device *dev) ^~~~~~~~~~ /kisskb/src/drivers/net/ethernet/8390/lib8390.c:201:12: warning: '__ei_open' defined but not used [-Wunused-function] static int __ei_open(struct net_device *dev) ^~~~~~~~~ In file included from /kisskb/src/arch/m68k/include/asm/atomic.h:7, from /kisskb/src/include/linux/atomic.h:7, from /kisskb/src/include/linux/cpumask.h:13, from /kisskb/src/include/linux/smp.h:13, from /kisskb/src/include/linux/lockdep.h:14, from /kisskb/src/include/linux/spinlock.h:59, from /kisskb/src/include/linux/wait.h:9, from /kisskb/src/include/linux/wait_bit.h:8, from /kisskb/src/include/linux/fs.h:6, from /kisskb/src/fs/ocfs2/file.c:13: /kisskb/src/fs/ocfs2/file.c: In function 'ocfs2_file_write_iter': /kisskb/src/arch/m68k/include/asm/cmpxchg.h:79:22: warning: value computed is not used [-Wunused-value] #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/fs/ocfs2/file.c:2419:3: note: in expansion of macro 'xchg' xchg(&iocb->ki_complete, saved_ki_complete); ^~~~ Completed OK # rm -rf /kisskb/build/powerpc-next_m68k-defconfig_m68k-gcc8 # Build took: 0:01:05.057638