# git rev-parse -q --verify c0beffc4f4c658fde86d52c837e784326e9cc875^{commit} c0beffc4f4c658fde86d52c837e784326e9cc875 already have revision, skipping fetch # git checkout -q -f -B kisskb c0beffc4f4c658fde86d52c837e784326e9cc875 # git clean -qxdf # < git log -1 # commit c0beffc4f4c658fde86d52c837e784326e9cc875 # Author: Nicholas Piggin # Date: Tue May 15 01:59:46 2018 +1000 # # powerpc/powernv: Fix opal_event_shutdown() called with interrupts disabled # # A kernel crash in process context that calls emergency_restart from # panic will end up calling opal_event_shutdown with interrupts disabled # but not in interrupt. This causes a sleeping function to be called # which gives the following warning with sysrq+c: # # Rebooting in 10 seconds.. # BUG: sleeping function called from invalid context at kernel/locking/mutex.c:238 # in_atomic(): 0, irqs_disabled(): 1, pid: 7669, name: bash # CPU: 20 PID: 7669 Comm: bash Tainted: G D W 4.17.0-rc5+ #3 # Call Trace: # dump_stack+0xb0/0xf4 (unreliable) # ___might_sleep+0x174/0x1a0 # mutex_lock+0x38/0xb0 # __free_irq+0x68/0x460 # free_irq+0x70/0xc0 # opal_event_shutdown+0xb4/0xf0 # opal_shutdown+0x24/0xa0 # pnv_shutdown+0x28/0x40 # machine_shutdown+0x44/0x60 # machine_restart+0x28/0x80 # emergency_restart+0x30/0x50 # panic+0x2a0/0x328 # oops_end+0x1ec/0x1f0 # bad_page_fault+0xe8/0x154 # handle_page_fault+0x34/0x38 # --- interrupt: 300 at sysrq_handle_crash+0x44/0x60 # LR = __handle_sysrq+0xfc/0x260 # flag_spec.62335+0x12b844/0x1e8db4 (unreliable) # __handle_sysrq+0xfc/0x260 # write_sysrq_trigger+0xa8/0xb0 # proc_reg_write+0xac/0x110 # __vfs_write+0x6c/0x240 # vfs_write+0xd0/0x240 # ksys_write+0x6c/0x110 # # Fixes: 9f0fd0499d30 ("powerpc/powernv: Add a virtual irqchip for opal events") # Signed-off-by: Nicholas Piggin # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-gcc --version # < git log --format=%s --max-count=1 c0beffc4f4c658fde86d52c837e784326e9cc875 # < make -s -j 48 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux- defconfig # make -s -j 48 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux- FIT description: Linux 4.17.0-rc3-gc0beffc Created: Fri May 18 03:24:22 2018 Image 0 (kernel@0) Description: Linux 4.17.0-rc3-gc0beffc Created: Fri May 18 03:24:22 2018 Type: Kernel Image Compression: gzip compressed Data Size: 4456596 Bytes = 4352.14 kB = 4.25 MB Architecture: MIPS OS: Linux Load Address: 0x80100000 Entry Point: 0x808905c0 Hash algo: sha1 Hash value: 63120495fdc1c37c6a90f76b93c2842c3bbcbbf5 Image 1 (fdt@boston) Description: img,boston Device Tree Created: Fri May 18 03:24:22 2018 Type: Flat Device Tree Compression: uncompressed Data Size: 3668 Bytes = 3.58 kB = 0.00 MB Architecture: MIPS Hash algo: sha1 Hash value: 569c37cc891ce1e1f3a193cb41cc691a5d2debb5 Image 2 (fdt@ni169445) Description: NI 169445 device tree Created: Fri May 18 03:24:22 2018 Type: Flat Device Tree Compression: uncompressed Data Size: 1871 Bytes = 1.83 kB = 0.00 MB Architecture: MIPS Hash algo: sha1 Hash value: 51b89b31605ee62038c8468c429af091dfc75ec7 Default Configuration: 'conf@default' Configuration 0 (conf@default) Description: Generic Linux kernel Kernel: kernel@0 Configuration 1 (conf@boston) Description: Boston Linux kernel Kernel: kernel@0 FDT: fdt@boston Configuration 2 (conf@ni169445) Description: NI 169445 Linux Kernel Kernel: kernel@0 FDT: fdt@ni169445 Completed OK # rm -rf /kisskb/build/powerpc-next_mips-defconfig_mipsel # Build took: 0:01:38.603150