# git rev-parse -q --verify 95f1fa9e3418d50ce099e67280b5497b9c93843b^{commit}
95f1fa9e3418d50ce099e67280b5497b9c93843b
already have revision, skipping fetch
# git checkout -q -f -B kisskb 95f1fa9e3418d50ce099e67280b5497b9c93843b
# git clean -qxdf
# < git log -1
# commit 95f1fa9e3418d50ce099e67280b5497b9c93843b
# Merge: 477093b3e144 16c0f03f629a
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Nov 27 11:42:01 2019 -0800
# 
#     Merge tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
#     
#     Pull tracing updates from Steven Rostedt:
#      "New tracing features:
#     
#        - New PERMANENT flag to ftrace_ops when attaching a callback to a
#          function.
#     
#          As /proc/sys/kernel/ftrace_enabled when set to zero will disable
#          all attached callbacks in ftrace, this has a detrimental impact on
#          live kernel tracing, as it disables all that it patched. If a
#          ftrace_ops is registered to ftrace with the PERMANENT flag set, it
#          will prevent ftrace_enabled from being disabled, and if
#          ftrace_enabled is already disabled, it will prevent a ftrace_ops
#          with PREMANENT flag set from being registered.
#     
#        - New register_ftrace_direct().
#     
#          As eBPF would like to register its own trampolines to be called by
#          the ftrace nop locations directly, without going through the ftrace
#          trampoline, this function has been added. This allows for eBPF
#          trampolines to live along side of ftrace, perf, kprobe and live
#          patching. It also utilizes the ftrace enabled_functions file that
#          keeps track of functions that have been modified in the kernel, to
#          allow for security auditing.
#     
#        - Allow for kernel internal use of ftrace instances.
#     
#          Subsystems in the kernel can now create and destroy their own
#          tracing instances which allows them to have their own tracing
#          buffer, and be able to record events without worrying about other
#          users from writing over their data.
#     
#        - New seq_buf_hex_dump() that lets users use the hex_dump() in their
#          seq_buf usage.
#     
#        - Notifications now added to tracing_max_latency to allow user space
#          to know when a new max latency is hit by one of the latency
#          tracers.
#     
#        - Wider spread use of generic compare operations for use of bsearch
#          and friends.
#     
#        - More synthetic event fields may be defined (32 up from 16)
#     
#        - Use of xarray for architectures with sparse system calls, for the
#          system call trace events.
#     
#       This along with small clean ups and fixes"
#     
#     * tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (51 commits)
#       tracing: Enable syscall optimization for MIPS
#       tracing: Use xarray for syscall trace events
#       tracing: Sample module to demonstrate kernel access to Ftrace instances.
#       tracing: Adding new functions for kernel access to Ftrace instances
#       tracing: Fix Kconfig indentation
#       ring-buffer: Fix typos in function ring_buffer_producer
#       ftrace: Use BIT() macro
#       ftrace: Return ENOTSUPP when DYNAMIC_FTRACE_WITH_DIRECT_CALLS is not configured
#       ftrace: Rename ftrace_graph_stub to ftrace_stub_graph
#       ftrace: Add a helper function to modify_ftrace_direct() to allow arch optimization
#       ftrace: Add helper find_direct_entry() to consolidate code
#       ftrace: Add another check for match in register_ftrace_direct()
#       ftrace: Fix accounting bug with direct->count in register_ftrace_direct()
#       ftrace/selftests: Fix spelling mistake "wakeing" -> "waking"
#       tracing: Increase SYNTH_FIELDS_MAX for synthetic_events
#       ftrace/samples: Add a sample module that implements modify_ftrace_direct()
#       ftrace: Add modify_ftrace_direct()
#       tracing: Add missing "inline" in stub function of latency_fsnotify()
#       tracing: Remove stray tab in TRACE_EVAL_MAP_FILE's help text
#       tracing: Use seq_buf_hex_dump() to dump buffers
#       ...
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 95f1fa9e3418d50ce099e67280b5497b9c93843b
# < make -s -j 10 ARCH=arm O=/kisskb/build/linus_colibri_pxa300_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  colibri_pxa300_defconfig
# make -s -j 10 ARCH=arm O=/kisskb/build/linus_colibri_pxa300_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' 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:338:21: note: 'pdeo' was declared here
/kisskb/src/drivers/usb/core/devio.c: In function 'async_completed':
/kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized]
WARNING: "return_address" [vmlinux] is a static EXPORT_SYMBOL_GPL
Completed OK
# rm -rf /kisskb/build/linus_colibri_pxa300_defconfig_arm
# Build took: 0:00:56.755664