# git rev-parse -q --verify ac61c1156623455c46701654abd8c99720bceea1^{commit} ac61c1156623455c46701654abd8c99720bceea1 already have revision, skipping fetch # git checkout -q -f -B kisskb ac61c1156623455c46701654abd8c99720bceea1 # git clean -qxdf # < git log -1 # commit ac61c1156623455c46701654abd8c99720bceea1 # Author: Nicholas Piggin # Date: Wed Apr 25 12:17:53 2018 +1000 # # powerpc: Fix smp_send_stop NMI IPI handling # # The NMI IPI handler for a receiving CPU increments nmi_ipi_busy_count # over the handler function call, which causes later smp_send_nmi_ipi() # callers to spin until the call is finished. # # The stop_this_cpu() function never returns, so the busy count is never # decremeted, which can cause the system to hang in some cases. For # example panic() will call smp_send_stop() early on which calls # stop_this_cpu() on other CPUs, then later in the reboot path, # pnv_restart() will call smp_send_stop() again, which hangs. # # Fix this by adding a special case to the stop_this_cpu() handler to # decrement the busy count, because it will never return. # # Now that the NMI/non-NMI versions of stop_this_cpu() are different, # split them out into separate functions rather than doing #ifdef tricks # to share the body between the two functions. # # Fixes: 6bed3237624e3 ("powerpc: use NMI IPI for smp_send_stop") # Reported-by: Abdul Haleem # Signed-off-by: Nicholas Piggin # [mpe: Split out the functions, tweak change log a bit] # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < git log --format=%s --max-count=1 ac61c1156623455c46701654abd8c99720bceea1 # < make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc6xx_defconfig # make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/sound/ppc/pmac.h:25:0, from /kisskb/src/sound/ppc/awacs.c:29: /kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init': /kisskb/src/include/sound/control.h:220:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized] return _snd_ctl_add_slave(master, slave, 0); ^ /kisskb/src/sound/ppc/awacs.c:886:36: note: 'speaker_vol' was declared here struct snd_kcontrol *master_vol, *speaker_vol; ^ arch/powerpc/boot/pq2fads.dtb: Warning (pci_bridge): /pci@f0010800: missing bus-range for PCI bridge arch/powerpc/boot/pq2fads.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' arch/powerpc/boot/mpc832x_rdb.dtb: Warning (interrupts_property): /qe@e0100000/mdio@3120/ethernet-phy@0:#interrupt-cells: size is (4), expected multiple of 8 arch/powerpc/boot/mpc832x_rdb.dtb: Warning (interrupts_property): /qe@e0100000/mdio@3120/ethernet-phy@4:#interrupt-cells: size is (4), expected multiple of 8 arch/powerpc/boot/mpc8272ads.dtb: Warning (pci_bridge): /pci@f0010800: missing bus-range for PCI bridge arch/powerpc/boot/mpc8272ads.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa5b0c8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa6b820) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa5b0c8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) Image Name: Linux-4.17.0-rc2+ Created: Wed Apr 25 22:09:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4929392 Bytes = 4813.86 kB = 4.70 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.17.0-rc2+ Created: Wed Apr 25 22:09:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4929287 Bytes = 4813.76 kB = 4.70 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.17.0-rc2+ Created: Wed Apr 25 22:09:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4905859 Bytes = 4790.88 kB = 4.68 MB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.17.0-rc2+ Created: Wed Apr 25 22:09:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4929578 Bytes = 4814.04 kB = 4.70 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.17.0-rc2+ Created: Wed Apr 25 22:09:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4929073 Bytes = 4813.55 kB = 4.70 MB Load Address: 00b00000 Entry Point: 00b007a0 Image Name: Linux-4.17.0-rc2+ Created: Wed Apr 25 22:09:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4929455 Bytes = 4813.92 kB = 4.70 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.17.0-rc2+ Created: Wed Apr 25 22:09:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4930013 Bytes = 4814.47 kB = 4.70 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.17.0-rc2+ Created: Wed Apr 25 22:09:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4929345 Bytes = 4813.81 kB = 4.70 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.17.0-rc2+ Created: Wed Apr 25 22:09:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4929509 Bytes = 4813.97 kB = 4.70 MB Load Address: 00b00000 Entry Point: 00b007a0 Completed OK # rm -rf /kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-5.3 # Build took: 0:01:52.699736