# git rev-parse -q --verify 4f9b514b765a3057341f3236c94877d9413babc7^{commit} 4f9b514b765a3057341f3236c94877d9413babc7 already have revision, skipping fetch # git checkout -q -f -B kisskb 4f9b514b765a3057341f3236c94877d9413babc7 # git clean -qxdf # git log -1 commit 4f9b514b765a3057341f3236c94877d9413babc7 Author: Thadeu Lima de Souza Cascardo Date: Mon Mar 27 16:32:33 2017 -0300 powerpc: Make /proc/self/stack always print the current stack For the current task, the kernel stack would only tell the last time the process was rescheduled, if ever. Use the current stack pointer for the current task. Otherwise, every once in a while, the stacktrace printed when reading /proc/self/stack would look like the process is running in userspace, while it's not, which some may consider as a bug. This is also consistent with some other architectures, like x86 and arm, at least. Signed-off-by: Thadeu Lima de Souza Cascardo 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 4f9b514b765a3057341f3236c94877d9413babc7 # < make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_powerpc-allnoconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- allnoconfig # make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_powerpc-allnoconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- make[1]: Entering directory '/home/kisskb/slave/build/powerpc-next_powerpc-allnoconfig_powerpc-5.3' GEN ./Makefile scripts/kconfig/conf --silentoldconfig Kconfig CHK include/config/kernel.release GEN ./Makefile UPD include/config/kernel.release WRAP arch/powerpc/include/generated/asm/clkdev.h WRAP arch/powerpc/include/generated/asm/div64.h WRAP arch/powerpc/include/generated/asm/export.h WRAP arch/powerpc/include/generated/asm/irq_regs.h WRAP arch/powerpc/include/generated/asm/irq_work.h WRAP arch/powerpc/include/generated/asm/local64.h WRAP arch/powerpc/include/generated/asm/mcs_spinlock.h WRAP arch/powerpc/include/generated/asm/preempt.h WRAP arch/powerpc/include/generated/asm/rwsem.h WRAP arch/powerpc/include/generated/asm/vtime.h CHK include/generated/uapi/linux/version.h UPD include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h UPD include/generated/utsrelease.h Using /home/kisskb/slave/src as source for kernel HOSTCC scripts/sortextable HOSTCC scripts/dtc/dtc.o HOSTCC scripts/dtc/flattree.o HOSTCC scripts/dtc/fstree.o CC scripts/mod/empty.o HOSTCC scripts/dtc/data.o HOSTCC scripts/mod/mk_elfconfig HOSTCC scripts/dtc/livetree.o SHIPPED scripts/dtc/dtc-lexer.lex.c HOSTCC scripts/dtc/treesource.o HOSTCC scripts/dtc/checks.o SHIPPED scripts/dtc/dtc-parser.tab.h CC scripts/mod/devicetable-offsets.s SHIPPED scripts/dtc/dtc-parser.tab.c HOSTCC scripts/dtc/util.o HOSTCC scripts/dtc/srcpos.o HOSTCC scripts/dtc/dtc-parser.tab.o HOSTCC scripts/dtc/dtc-lexer.lex.o GEN scripts/mod/devicetable-offsets.h MKELF scripts/mod/elfconfig.h HOSTCC scripts/mod/modpost.o HOSTCC scripts/mod/file2alias.o HOSTCC scripts/mod/sumversion.o HOSTLD scripts/dtc/dtc HOSTLD scripts/mod/modpost CHK include/generated/timeconst.h CC kernel/bounds.s UPD include/generated/timeconst.h CHK include/generated/bounds.h UPD include/generated/bounds.h CC arch/powerpc/kernel/asm-offsets.s CHK include/generated/asm-offsets.h UPD include/generated/asm-offsets.h CALL /home/kisskb/slave/src/scripts/checksyscalls.sh CC init/main.o CHK include/generated/compile.h LD usr/built-in.o CC init/do_mounts.o CC init/noinitramfs.o CC init/init_task.o UPD include/generated/compile.h CC init/version.o LD arch/powerpc/sysdev/built-in.o CC arch/powerpc/mm/fault.o AS arch/powerpc/lib/string.o CC arch/powerpc/mm/pgtable.o CC arch/powerpc/lib/alloc.o CC arch/powerpc/lib/code-patching.o LD arch/powerpc/platforms/built-in.o CC arch/powerpc/mm/mem.o AS arch/powerpc/lib/crtsavres.o CC arch/powerpc/mm/mmap.o CC arch/powerpc/mm/init_32.o CC arch/powerpc/mm/ppc_mmu_32.o CC arch/powerpc/lib/checksum_wrappers.o CC arch/powerpc/lib/feature-fixups.o CC arch/powerpc/mm/init-common.o AS arch/powerpc/lib/checksum_32.o AS arch/powerpc/lib/copy_32.o AS arch/powerpc/lib/div64.o CC arch/powerpc/mm/tlb_hash32.o CC arch/powerpc/mm/pgtable_32.o CC arch/powerpc/mm/hugetlbpage.o AS arch/powerpc/mm/hash_low_32.o CC arch/powerpc/mm/mmu_context_hash32.o LD arch/powerpc/math-emu/built-in.o CC arch/powerpc/kernel/ptrace.o CC arch/powerpc/kernel/cputable.o CC arch/powerpc/kernel/syscalls.o CC arch/powerpc/kernel/irq.o CC arch/powerpc/kernel/pmc.o CC arch/powerpc/kernel/signal_32.o CC arch/powerpc/kernel/align.o CC arch/powerpc/kernel/process.o CPP arch/powerpc/kernel/systbl_chk.i CC arch/powerpc/kernel/vdso.o CC arch/powerpc/kernel/signal.o CC arch/powerpc/kernel/sysfs.o CC arch/powerpc/kernel/idle.o CC arch/powerpc/kernel/prom.o CC arch/powerpc/kernel/cacheinfo.o CC arch/powerpc/kernel/time.o AS arch/powerpc/kernel/misc.o CC arch/powerpc/kernel/setup-common.o CC arch/powerpc/kernel/traps.o CC arch/powerpc/kernel/dma.o CC arch/powerpc/kernel/udbg.o CC arch/powerpc/kernel/of_platform.o CC arch/powerpc/kernel/prom_parse.o LD arch/powerpc/crypto/built-in.o AS arch/powerpc/kernel/misc_32.o CC arch/powerpc/kernel/io.o AS arch/powerpc/kernel/entry_32.o AS arch/powerpc/kernel/l2cr_6xx.o AS arch/powerpc/kernel/cpu_setup_6xx.o AS arch/powerpc/kernel/idle_6xx.o LD arch/powerpc/net/built-in.o CC arch/powerpc/kernel/setup_32.o CC arch/powerpc/kernel/pci_32.o CC arch/powerpc/kernel/pci-common.o CC arch/powerpc/kernel/pci_of_scan.o CC arch/powerpc/kernel/iomap.o AS arch/powerpc/kernel/head_32.o LDS arch/powerpc/kernel/vmlinux.lds CALL /home/kisskb/slave/src/arch/powerpc/kernel/systbl_chk.sh AS arch/powerpc/kernel/fpu.o VDSO32A arch/powerpc/kernel/vdso32/sigtramp.o VDSO32A arch/powerpc/kernel/vdso32/datapage.o VDSO32A arch/powerpc/kernel/vdso32/gettimeofday.o LDS arch/powerpc/kernel/vdso32/vdso32.lds AS arch/powerpc/kernel/systbl.o VDSO32A arch/powerpc/kernel/vdso32/cacheflush.o LD arch/powerpc/lib/built-in.o VDSO32A arch/powerpc/kernel/vdso32/note.o LD init/mounts.o LD certs/built-in.o VDSO32L arch/powerpc/kernel/vdso32/vdso32.so.dbg OBJCOPY arch/powerpc/kernel/vdso32/vdso32.so AS arch/powerpc/kernel/vdso32/vdso32_wrapper.o LD arch/powerpc/kernel/vdso32/built-in.o LD ipc/built-in.o LD arch/powerpc/mm/built-in.o CC kernel/fork.o CC kernel/exec_domain.o CC kernel/panic.o CC kernel/resource.o CC kernel/capability.o CC kernel/cpu.o CC kernel/ptrace.o CC security/commoncap.o CC kernel/sysctl_binary.o CC kernel/user.o CC kernel/signal.o CC kernel/softirq.o CC kernel/sysctl.o CC kernel/task_work.o CC kernel/exit.o CC kernel/ksysfs.o CC kernel/kmod.o CC kernel/extable.o CC kernel/workqueue.o CC kernel/kthread.o CC kernel/sys.o CC security/min_addr.o CC kernel/params.o CC kernel/pid.o CC kernel/notifier.o CC kernel/nsproxy.o CC kernel/sys_ni.o CC kernel/cred.o CC kernel/reboot.o CC kernel/async.o CC kernel/range.o CC kernel/smpboot.o CC kernel/ucount.o LD block/built-in.o LD crypto/built-in.o LD kernel/livepatch/built-in.o LD init/built-in.o CC kernel/irq/irqdesc.o CC kernel/power/qos.o CC fs/open.o CC kernel/locking/mutex.o CC kernel/printk/printk.o LD sound/built-in.o CC kernel/rcu/update.o CC mm/filemap.o CC kernel/rcu/sync.o CC kernel/dma.o CC kernel/rcu/tiny.o CC kernel/locking/rwsem.o CC kernel/locking/semaphore.o CC kernel/locking/percpu-rwsem.o CC kernel/sched/core.o CC mm/mempool.o CC kernel/sched/loadavg.o CC kernel/time/time.o CC kernel/up.o CC fs/read_write.o CC kernel/elfcore.o CC fs/file_table.o LD kernel/power/built-in.o CC kernel/memremap.o CC fs/super.o CC kernel/locking/rwsem-xadd.o CC kernel/time/timer.o CC fs/char_dev.o CC kernel/time/hrtimer.o CC fs/stat.o LD kernel/printk/built-in.o LD net/built-in.o CC kernel/time/timekeeping.o CC kernel/time/ntp.o CC fs/exec.o LD firmware/built-in.o CC fs/pipe.o CC kernel/time/jiffies.o CC kernel/time/clocksource.o LD security/built-in.o CC kernel/time/timeconv.o CC kernel/time/timer_list.o CC fs/namei.o CC kernel/time/timecounter.o CC fs/fcntl.o CC kernel/sched/clock.o LD arch/powerpc/kernel/built-in.o CC fs/ioctl.o CC kernel/sched/cputime.o CC kernel/sched/idle_task.o CC fs/readdir.o CC fs/select.o CC kernel/time/alarmtimer.o CC fs/dcache.o LD virt/lib/built-in.o CC fs/inode.o CC kernel/irq/handle.o CC kernel/irq/manage.o CC fs/attr.o LD kernel/locking/built-in.o CC kernel/irq/spurious.o CC fs/bad_inode.o CC kernel/irq/resend.o LD virt/built-in.o CC kernel/time/posix-stubs.o LD drivers/amba/built-in.o LD drivers/auxdisplay/built-in.o LD kernel/rcu/built-in.o CC kernel/irq/chip.o CC kernel/irq/dummychip.o CC fs/file.o CC kernel/time/clockevents.o LD drivers/block/built-in.o CC kernel/time/tick-common.o CC mm/oom_kill.o CC mm/maccess.o CC fs/filesystems.o LD drivers/bus/built-in.o LD drivers/cdrom/built-in.o CC fs/namespace.o CC kernel/sched/fair.o LD drivers/char/ipmi/built-in.o CC kernel/sched/rt.o CC kernel/sched/deadline.o CC drivers/char/mem.o CC fs/seq_file.o CC kernel/sched/stop_task.o CC lib/lockref.o CC lib/bcd.o CC drivers/base/core.o CC drivers/base/component.o CC kernel/irq/devres.o CC kernel/sched/wait.o LD drivers/clk/bcm/built-in.o CC kernel/irq/irqdomain.o CC drivers/char/random.o CC fs/xattr.o CC lib/div64.o CC lib/sort.o CC fs/libfs.o CC lib/parser.o CC lib/random32.o CC fs/fs-writeback.o CC lib/debug_locks.o LD drivers/clk/mvebu/built-in.o CC lib/bust_spinlocks.o CC lib/kasprintf.o CC lib/bitmap.o LD drivers/clk/ti/built-in.o CC lib/scatterlist.o CC lib/gcd.o CC fs/pnode.o LD drivers/clocksource/built-in.o LD drivers/clk/built-in.o CC fs/splice.o CC drivers/char/misc.o CC fs/sync.o CC fs/utimes.o CC fs/stack.o CC mm/page_alloc.o CC mm/page-writeback.o CC mm/readahead.o LD drivers/firewire/built-in.o CC mm/swap.o CC lib/lcm.o CC mm/truncate.o CC mm/vmscan.o CC drivers/base/driver.o CC drivers/base/bus.o LD kernel/time/built-in.o CC drivers/base/dd.o CC drivers/base/syscore.o LD drivers/hwtracing/intel_th/built-in.o LD drivers/idle/built-in.o CC drivers/irqchip/irqchip.o LD drivers/firmware/broadcom/built-in.o LD drivers/firmware/meson/built-in.o LD drivers/gpu/vga/built-in.o LD drivers/char/agp/built-in.o LD drivers/i2c/algos/built-in.o CC kernel/sched/swait.o LD drivers/i2c/busses/built-in.o LD drivers/lguest/built-in.o LD drivers/macintosh/built-in.o LD drivers/firmware/tegra/built-in.o CC kernel/sched/completion.o CC kernel/sched/idle.o LD drivers/firmware/built-in.o LD drivers/char/built-in.o LD drivers/mfd/built-in.o LD drivers/mmc/built-in.o LD drivers/i2c/muxes/built-in.o LD drivers/net/built-in.o CC mm/shmem.o CC lib/list_sort.o CC lib/uuid.o LD drivers/gpu/drm/bridge/built-in.o CC lib/flex_array.o CC fs/fs_struct.o LD drivers/gpu/drm/hisilicon/built-in.o CC drivers/base/class.o LD drivers/i2c/built-in.o CC fs/statfs.o CC mm/util.o CC fs/fs_pin.o LD drivers/gpu/drm/panel/built-in.o LD drivers/gpu/drm/tilcdc/built-in.o LD drivers/gpu/drm/i2c/built-in.o LD drivers/misc/cb710/built-in.o LD drivers/irqchip/built-in.o LD drivers/nfc/built-in.o CC fs/no-block.o CC fs/nsfs.o LD fs/devpts/built-in.o LD fs/exofs/built-in.o LD drivers/gpu/drm/omapdrm/displays/built-in.o LD drivers/gpu/drm/omapdrm/dss/built-in.o LD drivers/misc/eeprom/built-in.o LD drivers/misc/ti-st/built-in.o LD drivers/misc/lis3lv02d/built-in.o LD drivers/nvme/host/built-in.o CC drivers/base/platform.o LD drivers/gpu/drm/omapdrm/built-in.o CC drivers/base/firmware.o CC fs/binfmt_elf.o LD fs/quota/built-in.o LD drivers/misc/mic/bus/built-in.o CC mm/mmzone.o CC mm/vmstat.o CC drivers/base/cpu.o LD kernel/irq/built-in.o CC mm/backing-dev.o LD drivers/nvme/target/built-in.o LD drivers/pci/dwc/built-in.o CC mm/mm_init.o CC mm/percpu.o CC mm/mmu_context.o LD drivers/gpu/drm/built-in.o CC fs/ramfs/inode.o LD drivers/misc/mic/built-in.o LD fs/notify/dnotify/built-in.o LD drivers/media/common/b2c2/built-in.o CC drivers/of/base.o LD drivers/platform/built-in.o CC drivers/of/device.o CC drivers/of/platform.o CC drivers/of/fdt.o LD drivers/nvme/built-in.o LD drivers/misc/built-in.o LD drivers/media/firewire/built-in.o LD drivers/power/built-in.o CC lib/iov_iter.o LD drivers/media/common/saa7146/built-in.o LD fs/notify/fanotify/built-in.o CC drivers/pci/access.o LD fs/notify/inotify/built-in.o CC lib/clz_ctz.o CC lib/find_bit.o CC lib/bsearch.o LD drivers/gpu/built-in.o CC lib/llist.o LD fs/notify/built-in.o CC lib/memweight.o LD drivers/media/common/siano/built-in.o LD kernel/sched/built-in.o CC lib/kfifo.o CC lib/percpu-refcount.o LD drivers/media/common/v4l2-tpg/built-in.o CC mm/slab_common.o LD drivers/ptp/built-in.o CC lib/percpu_ida.o LD kernel/built-in.o LD drivers/pwm/built-in.o CC fs/ramfs/file-mmu.o CC mm/compaction.o LD drivers/media/common/built-in.o CC drivers/base/init.o CC drivers/base/devres.o CC mm/vmacache.o CC drivers/base/map.o CC mm/interval_tree.o CC lib/reciprocal_div.o CC lib/rhashtable.o CC mm/swap_slots.o CC mm/list_lru.o CC lib/once.o LD drivers/soc/bcm/built-in.o CC drivers/pci/bus.o CC drivers/pci/probe.o CC drivers/pci/host-bridge.o CC mm/workingset.o CC drivers/pci/remove.o LD drivers/soc/fsl/built-in.o CC mm/gup.o CC mm/debug.o LD drivers/media/i2c/soc_camera/built-in.o LD drivers/soc/built-in.o CC mm/highmem.o CC mm/memory.o CC drivers/base/attribute_container.o CC drivers/of/fdt_address.o CC lib/refcount.o CC lib/string_helpers.o LD drivers/media/mmc/siano/built-in.o LD drivers/media/platform/omap/built-in.o LD drivers/media/spi/built-in.o LD drivers/media/i2c/built-in.o LD drivers/media/rc/keymaps/built-in.o CC lib/hexdump.o LD drivers/media/mmc/built-in.o LD drivers/media/rc/built-in.o CC drivers/of/address.o LD drivers/media/platform/built-in.o CC drivers/of/irq.o LD drivers/tty/ipwireless/built-in.o LD drivers/tty/vt/built-in.o LD drivers/tty/serial/built-in.o CC mm/mincore.o CC mm/mlock.o CC mm/mprotect.o CC mm/mmap.o CC mm/mremap.o LD drivers/media/tuners/built-in.o CC mm/page_vma_mapped.o CC mm/msync.o CC mm/pagewalk.o LD drivers/tty/built-in.o CC mm/rmap.o CC lib/kstrtox.o CC drivers/pci/pci.o CC mm/pgtable-generic.o CC lib/pci_iomap.o LD drivers/media/pci/b2c2/built-in.o LD drivers/media/pci/ddbridge/built-in.o CC mm/vmalloc.o CC lib/iomap_copy.o CC drivers/of/of_pci.o LD drivers/media/pci/dm1105/built-in.o LD drivers/media/pci/mantis/built-in.o CC drivers/of/of_reserved_mem.o LD fs/ramfs/ramfs.o CC drivers/of/of_pci_irq.o LD drivers/media/pci/netup_unidvb/built-in.o CC mm/init-mm.o LD fs/ramfs/built-in.o LD drivers/media/pci/ngene/built-in.o LD drivers/media/pci/pluto2/built-in.o LD drivers/media/usb/b2c2/built-in.o LD drivers/media/usb/dvb-usb/built-in.o CC lib/devres.o CC drivers/base/transport_class.o LD drivers/media/pci/pt1/built-in.o CC drivers/base/topology.o LD drivers/media/pci/saa7146/built-in.o CC mm/nobootmem.o LD drivers/media/pci/pt3/built-in.o LD drivers/media/pci/smipcie/built-in.o LD drivers/media/usb/s2255/built-in.o LD drivers/media/usb/dvb-usb-v2/built-in.o CC drivers/pci/pci-driver.o CC lib/hweight.o CC lib/bitrev.o CC lib/syscall.o HOSTCC lib/gen_crc32table LD drivers/media/pci/ttpci/built-in.o LD drivers/media/usb/stkwebcam/built-in.o LD drivers/media/usb/siano/built-in.o LD drivers/media/pci/built-in.o LD drivers/usb/host/built-in.o LD drivers/media/usb/ttusb-budget/built-in.o LD drivers/media/usb/ttusb-dec/built-in.o CC mm/memblock.o CC mm/dmapool.o CC mm/slub.o LD drivers/usb/built-in.o LD drivers/media/usb/zr364xx/built-in.o CC lib/atomic64.o CC drivers/pci/search.o CC drivers/pci/pci-sysfs.o LD drivers/media/usb/built-in.o CC drivers/base/container.o CC lib/strncpy_from_user.o CC lib/strnlen_user.o CC drivers/pci/rom.o CC lib/argv_split.o CC lib/chacha20.o CC drivers/base/property.o LD drivers/video/backlight/built-in.o CC drivers/pci/setup-res.o CC lib/cmdline.o CC drivers/base/cacheinfo.o LD drivers/video/fbdev/core/built-in.o LD drivers/base/power/built-in.o LD drivers/base/test/built-in.o CC drivers/pci/irq.o LD drivers/media/built-in.o CC drivers/pci/vpd.o CC lib/ctype.o CC drivers/pci/vc.o CC drivers/pci/setup-bus.o CC drivers/pci/of.o CC drivers/base/dma-mapping.o CC drivers/pci/syscall.o CC lib/dec_and_lock.o CC lib/dump_stack.o LD drivers/video/fbdev/omap2/omapfb/displays/built-in.o LD drivers/pci/host/built-in.o CC lib/decompress.o LD fs/built-in.o LD drivers/video/fbdev/omap2/omapfb/dss/built-in.o CC lib/fdt_rw.o CC lib/fdt_empty_tree.o CC lib/fdt_ro.o CC lib/fdt.o CC lib/extable.o CC lib/earlycpio.o CC lib/fdt_strerror.o CC lib/fdt_sw.o LD drivers/video/fbdev/omap2/omapfb/built-in.o CC lib/fdt_wip.o CC lib/flex_proportions.o CC lib/idr.o CC lib/ioremap.o CC lib/int_sqrt.o CC lib/irq_regs.o CC lib/is_single_threaded.o CC lib/klist.o CC lib/kobject.o CC lib/kobject_uevent.o LD drivers/video/fbdev/omap2/built-in.o CC lib/md5.o CC lib/nmi_backtrace.o CC lib/radix-tree.o CC lib/plist.o CC lib/ratelimit.o CC lib/nodemask.o LD drivers/video/fbdev/built-in.o CC lib/rbtree.o CC lib/seq_buf.o CC lib/sha1.o CC lib/siphash.o CC lib/show_mem.o LD drivers/video/built-in.o CC lib/string.o CC lib/timerqueue.o CC lib/win_minmax.o CC lib/vsprintf.o GEN lib/crc32table.h LD drivers/of/built-in.o CC lib/crc32.o LD drivers/base/built-in.o LD mm/built-in.o LD drivers/pci/built-in.o LD drivers/built-in.o AR lib/lib.a EXPORTS lib/lib-ksyms.o LD lib/built-in.o GEN .version CHK include/generated/compile.h UPD include/generated/compile.h CC init/version.o LD init/built-in.o LD vmlinux.o MODPOST vmlinux.o LD vmlinux SORTEX vmlinux SYSMAP System.map /opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-strip -s -R .comment vmlinux -o arch/powerpc/boot/vmlinux.strip make[1]: Leaving directory '/home/kisskb/slave/build/powerpc-next_powerpc-allnoconfig_powerpc-5.3' Completed OK # rm -rf /home/kisskb/slave/build/powerpc-next_powerpc-allnoconfig_powerpc-5.3 # Build took: 0:00:14.848972