# git rev-parse -q --verify 343a9f35409b68b6de66ecd0db90a277aee90ec2^{commit}
343a9f35409b68b6de66ecd0db90a277aee90ec2
already have revision, skipping fetch
# git checkout -q -f -B kisskb 343a9f35409b68b6de66ecd0db90a277aee90ec2
# git clean -qxdf
# < git log -1
# commit 343a9f35409b68b6de66ecd0db90a277aee90ec2
# Merge: f4267b3604a8 a2acce536921
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Oct 30 09:49:56 2018 -0700
# 
#     Merge tag 'trace-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
#     
#     Pull tracing updates from Steven Rostedt:
#      "The biggest change here is the updates to kprobes
#     
#       Back in January I posted patches to create function based events.
#       These were the events that you suggested I make to allow developers to
#       easily create events in code where no trace event exists. After
#       posting those changes for review, it was suggested that we implement
#       this instead with kprobes.
#     
#       The problem with kprobes is that the interface is too complex and
#       needs to be simplified. Masami Hiramatsu posted patches in March and
#       I've been playing with them a bit. There's been a bit of clean up in
#       the kprobe code that was inspired by the function based event patches,
#       and a couple of enhancements to the kprobe event interface.
#     
#        - If the arch supports it (we added support for x86), you can place a
#          kprobe event at the start of a function and use $arg1, $arg2, etc
#          to reference the arguments of a function. (Before you needed to
#          know what register or where on the stack the argument was).
#     
#        - The second is a way to see array of events. For example, if you
#          reference a mac address, you can add:
#     
#             echo 'p:mac ip_rcv perm_addr=+574($arg2):x8[6]' > kprobe_events
#     
#          And this will produce:
#     
#             mac: (ip_rcv+0x0/0x140) perm_addr={0x52,0x54,0x0,0xc0,0x76,0xec}
#     
#       Other changes include
#     
#        - Exporting trace_dump_stack to modules
#     
#        - Have the stack tracer trace the entire stack (stop trying to remove
#          tracing itself, as we keep removing too much).
#     
#        - Added support for SDT in uprobes"
#     
#     [ SDT - "Statically Defined Tracing" are userspace markers for tracing.
#       Let's not use random TLA's in explanations unless they are fairly
#       well-established as generic (at least for kernel people) - Linus ]
#     
#     * tag 'trace-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (24 commits)
#       tracing: Have stack tracer trace full stack
#       tracing: Export trace_dump_stack to modules
#       tracing: probeevent: Fix uninitialized used of offset in parse args
#       tracing/kprobes: Allow kprobe-events to record module symbol
#       tracing/kprobes: Check the probe on unloaded module correctly
#       tracing/uprobes: Fix to return -EFAULT if copy_from_user failed
#       tracing: probeevent: Add $argN for accessing function args
#       x86: ptrace: Add function argument access API
#       tracing: probeevent: Add array type support
#       tracing: probeevent: Add symbol type
#       tracing: probeevent: Unify fetch_insn processing common part
#       tracing: probeevent: Append traceprobe_ for exported function
#       tracing: probeevent: Return consumed bytes of dynamic area
#       tracing: probeevent: Unify fetch type tables
#       tracing: probeevent: Introduce new argument fetching code
#       tracing: probeevent: Remove NOKPROBE_SYMBOL from print functions
#       tracing: probeevent: Cleanup argument field definition
#       tracing: probeevent: Cleanup print argument functions
#       trace_uprobe: support reference counter in fd-based uprobe
#       perf probe: Support SDT markers having reference counter (semaphore)
#       ...
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-gcc --version
# < git log --format=%s --max-count=1 343a9f35409b68b6de66ecd0db90a277aee90ec2
# < make -s -j 48 ARCH=s390 O=/kisskb/build/linus_s390-allmodconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# yes \n | make -s -j 48 ARCH=s390 O=/kisskb/build/linus_s390-allmodconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=s390 O=/kisskb/build/linus_s390-allmodconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  
/kisskb/src/kernel/events/ring_buffer.c: In function 'perf_output_begin_forward':
/kisskb/src/kernel/events/ring_buffer.c:238:1: warning: 'perf_output_begin_forward' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/ring_buffer.c: In function 'perf_output_begin_backward':
/kisskb/src/kernel/events/ring_buffer.c:244:1: warning: 'perf_output_begin_backward' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/ring_buffer.c: In function 'perf_output_begin':
/kisskb/src/kernel/events/ring_buffer.c:252:1: warning: 'perf_output_begin' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_log_throttle':
/kisskb/src/kernel/events/core.c:7651:1: warning: 'perf_log_throttle' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_swevent_hrtimer':
/kisskb/src/kernel/events/core.c:9163:1: warning: 'perf_swevent_hrtimer' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_log_itrace_start':
/kisskb/src/kernel/events/core.c:7692:1: warning: 'perf_log_itrace_start' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_event_read_event':
/kisskb/src/kernel/events/core.c:6581:1: warning: 'perf_event_read_event' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_event_task_output':
/kisskb/src/kernel/events/core.c:6860:1: warning: 'perf_event_task_output' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_event_mmap_output':
/kisskb/src/kernel/events/core.c:7216:1: warning: 'perf_event_mmap_output' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_event_namespaces_output':
/kisskb/src/kernel/events/core.c:7053:1: warning: 'perf_event_namespaces_output' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_event_comm_output':
/kisskb/src/kernel/events/core.c:6954:1: warning: 'perf_event_comm_output' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_event_switch_output':
/kisskb/src/kernel/events/core.c:7580:1: warning: 'perf_event_switch_output' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_event_aux_event':
/kisskb/src/kernel/events/core.c:7488:1: warning: 'perf_event_aux_event' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_log_lost_samples':
/kisskb/src/kernel/events/core.c:7521:1: warning: 'perf_log_lost_samples' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function 'perf_tp_event':
/kisskb/src/kernel/events/core.c:8331:1: warning: 'perf_tp_event' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/events/core.c: In function '___perf_sw_event':
/kisskb/src/kernel/events/core.c:8017:1: warning: '___perf_sw_event' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:187:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount':
/kisskb/src/kernel/cgroup/cgroup-v1.c:1256:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/s390/kernel/nospec-branch.c: In function '__nospec_revert':
/kisskb/src/arch/s390/kernel/nospec-branch.c:130:61: error: macro "memcpy" passed 6 arguments, but takes just 3
/kisskb/src/arch/s390/kernel/nospec-branch.c:130:3: warning: statement with no effect [-Wunused-value]
make[3]: *** [/kisskb/src/scripts/Makefile.build:293: arch/s390/kernel/nospec-branch.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:518: arch/s390/kernel] Error 2
make[1]: *** [/kisskb/src/Makefile:1060: arch/s390] Error 2
make[1]: *** Waiting for unfinished jobs....
/kisskb/src/fs/afs/dynroot.c: In function 'afs_lookup_atcell':
/kisskb/src/fs/afs/dynroot.c:126:6: warning: 'len' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/smp.c: In function 'smp_call_function_single':
/kisskb/src/kernel/smp.c:307:1: warning: 'smp_call_function_single' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/rseq.c: In function 'rseq_ip_fixup':
/kisskb/src/kernel/rseq.c:249:1: warning: 'rseq_ip_fixup' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/rseq.c: In function 'rseq_syscall':
/kisskb/src/kernel/rseq.c:301:1: warning: 'rseq_syscall' uses dynamic stack allocation [enabled by default]
/kisskb/src/kernel/sched/psi.c: In function 'cgroup_move_task':
/kisskb/src/kernel/sched/sched.h:1063:8: warning: 'rq' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/sched/psi.c:639:13: note: 'rq' was declared here
/kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page':
/kisskb/src/mm/hugetlb.c:1433:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/slub.c: In function 'deactivate_slab.isra.37':
/kisskb/src/mm/slub.c:2170:1: warning: 'deactivate_slab.isra.37' uses dynamic stack allocation [enabled by default]
/kisskb/src/mm/slub.c: In function 'unfreeze_partials.isra.38':
/kisskb/src/mm/slub.c:2238:1: warning: 'unfreeze_partials.isra.38' uses dynamic stack allocation [enabled by default]
/kisskb/src/mm/slub.c: In function 'get_partial_node.isra.39':
/kisskb/src/mm/slub.c:1870:1: warning: 'get_partial_node.isra.39' uses dynamic stack allocation [enabled by default]
/kisskb/src/mm/slub.c: In function '___slab_alloc':
/kisskb/src/mm/slub.c:2625:1: warning: '___slab_alloc' uses dynamic stack allocation [enabled by default]
/kisskb/src/mm/slub.c: In function '__slab_free':
/kisskb/src/mm/slub.c:2926:1: warning: '__slab_free' uses dynamic stack allocation [enabled by default]
/kisskb/src/fs/btrfs/ref-verify.c: In function 'process_extent_item.isra.2':
/kisskb/src/fs/btrfs/ref-verify.c:503:2: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/btrfs/ref-verify.c: In function 'process_leaf.isra.3':
/kisskb/src/fs/btrfs/ref-verify.c:555:2: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/f2fs/file.c: In function 'f2fs_precache_extents':
/kisskb/src/fs/f2fs/file.c:2926:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c: In function 'proc_reg_open':
/kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c:341:21: note: 'pdeo' was declared here
/kisskb/src/fs/nfs/super.c: In function 'nfs_show_stats':
/kisskb/src/fs/nfs/super.c:890:1: warning: 'nfs_show_stats' uses dynamic stack allocation [enabled by default]
/kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc':
/kisskb/src/fs/nfsd/nfs4xdr.c:2069:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/nfsd/nfs4xdr.c:2074:42: warning: 'end' may be used uninitialized in this function [-Wuninitialized]
make: *** [Makefile:152: sub-make] Error 2
Command 'make -s -j 48 ARCH=s390 O=/kisskb/build/linus_s390-allmodconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_s390-allmodconfig_s390x
# Build took: 0:01:24.795474