# git rev-parse -q --verify a75a001540d03c30315e43884ad95cc68040f18d^{commit} a75a001540d03c30315e43884ad95cc68040f18d already have revision, skipping fetch # git checkout -q -f -B kisskb a75a001540d03c30315e43884ad95cc68040f18d # git clean -qxdf # < git log -1 # commit a75a001540d03c30315e43884ad95cc68040f18d # Author: Michael Ellerman # Date: Thu Nov 1 16:21:05 2018 +1100 # # powerpc/mm/64s: Fix preempt warning in slb_allocate_kernel() # # With preempt enabled we see warnings in do_slb_fault(): # # BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u33:0/98 # futex hash table entries: 4096 (order: 3, 524288 bytes) # caller is do_slb_fault+0x204/0x230 # CPU: 5 PID: 98 Comm: kworker/u33:0 Not tainted 4.19.0-rc3-gcc-7.3.1-00022-g1936f094e164 #138 # Call Trace: # dump_stack+0xb4/0x104 (unreliable) # check_preemption_disabled+0x148/0x150 # do_slb_fault+0x204/0x230 # data_access_slb_common+0x138/0x180 # # This is caused by the get_paca() in slb_allocate_kernel(), which # includes a call to debug_smp_processor_id(). # # slb_allocate_kernel() can only be called from do_slb_fault(), and in # that path interrupts are hard disabled and so we can't be preempted, # but we can't update the preempt flags (in thread_info) because that # could cause an SLB fault. # # So just use local_paca which is safe and doesn't cause the warning. # # Fixes: 48e7b7695745 ("powerpc/64s/hash: Convert SLB miss handlers to C") # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < git log --format=%s --max-count=1 a75a001540d03c30315e43884ad95cc68040f18d # < make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_smp_defconfig # make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/include/linux/kernel.h:10:0, from /kisskb/src/include/linux/list.h:9, from /kisskb/src/include/linux/module.h:9, 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] #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO) ^ /kisskb/src/include/linux/compiler.h:77:42: note: in definition of macro 'unlikely' # 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' if (IS_ERR_VALUE(fep->ring_mem_addr)) ^ arch/powerpc/boot/dts/fsl/mpc8541cds.dtb: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) arch/powerpc/boot/dts/fsl/mpc8555cds.dtb: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc1343c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5965313 Bytes = 5825.50 KiB = 5.69 MiB Load Address: 00000000 Entry Point: 00000000 INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996136 Bytes = 5855.60 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5997023 Bytes = 5856.47 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996128 Bytes = 5855.59 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5997989 Bytes = 5857.41 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5998088 Bytes = 5857.51 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996796 Bytes = 5856.25 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996026 Bytes = 5855.49 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d00320 INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc23c30) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5998150 Bytes = 5857.57 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:35 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996769 Bytes = 5856.22 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:35 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996772 Bytes = 5856.22 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d00320 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:35 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996774 Bytes = 5856.22 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d00320 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:35 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5995871 Bytes = 5855.34 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:36 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996439 Bytes = 5855.90 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d00320 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:36 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996114 Bytes = 5855.58 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d002b0 Image Name: Linux-4.20.0-rc1-ga75a001540d0 Created: Thu Nov 8 10:24:36 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5996136 Bytes = 5855.60 KiB = 5.72 MiB Load Address: 00d00000 Entry Point: 00d00320 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-gcc5 # Build took: 0:03:15.298396