# git rev-parse -q --verify 5450e8a316a64cddcbc15f90733ebc78aa736545^{commit}
5450e8a316a64cddcbc15f90733ebc78aa736545
already have revision, skipping fetch
# git checkout -q -f -B kisskb 5450e8a316a64cddcbc15f90733ebc78aa736545
# git clean -qxdf
# < git log -1
# commit 5450e8a316a64cddcbc15f90733ebc78aa736545
# Merge: 29cd581b5949 172bb24a4f48
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Jul 10 22:17:21 2019 -0700
# 
#     Merge tag 'pidfd-updates-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
#     
#     Pull pidfd updates from Christian Brauner:
#      "This adds two main features.
#     
#        - First, it adds polling support for pidfds. This allows process
#          managers to know when a (non-parent) process dies in a race-free
#          way.
#     
#          The notification mechanism used follows the same logic that is
#          currently used when the parent of a task is notified of a child's
#          death. With this patchset it is possible to put pidfds in an
#          {e}poll loop and get reliable notifications for process (i.e.
#          thread-group) exit.
#     
#        - The second feature compliments the first one by making it possible
#          to retrieve pollable pidfds for processes that were not created
#          using CLONE_PIDFD.
#     
#          A lot of processes get created with traditional PID-based calls
#          such as fork() or clone() (without CLONE_PIDFD). For these
#          processes a caller can currently not create a pollable pidfd. This
#          is a problem for Android's low memory killer (LMK) and service
#          managers such as systemd.
#     
#       Both patchsets are accompanied by selftests.
#     
#       It's perhaps worth noting that the work done so far and the work done
#       in this branch for pidfd_open() and polling support do already see
#       some adoption:
#     
#        - Android is in the process of backporting this work to all their LTS
#          kernels [1]
#     
#        - Service managers make use of pidfd_send_signal but will need to
#          wait until we enable waiting on pidfds for full adoption.
#     
#        - And projects I maintain make use of both pidfd_send_signal and
#          CLONE_PIDFD [2] and will use polling support and pidfd_open() too"
#     
#     [1] https://android-review.googlesource.com/q/topic:%22pidfd+polling+support+4.9+backport%22
#         https://android-review.googlesource.com/q/topic:%22pidfd+polling+support+4.14+backport%22
#         https://android-review.googlesource.com/q/topic:%22pidfd+polling+support+4.19+backport%22
#     
#     [2] https://github.com/lxc/lxc/blob/aab6e3eb73c343231cdde775db938994fc6f2803/src/lxc/start.c#L1753
#     
#     * tag 'pidfd-updates-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
#       tests: add pidfd_open() tests
#       arch: wire-up pidfd_open()
#       pid: add pidfd_open()
#       pidfd: add polling selftests
#       pidfd: add polling support
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version
# < git log --format=%s --max-count=1 5450e8a316a64cddcbc15f90733ebc78aa736545
# < make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_maple_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  maple_defconfig
# make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_maple_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:140:32: warning: 'levelspread[<Ua5a0>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:88:6: note: 'levelspread[<Ua5a0>]' was declared here
/kisskb/src/kernel/sched/core.c: In function 'try_to_wake_up':
/kisskb/src/include/asm-generic/bitops/non-atomic.h:106:21: warning: 'cpu' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/sched/core.c:2400:6: note: 'cpu' was declared here
/kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page':
/kisskb/src/mm/hugetlb.c:1465:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read':
/kisskb/src/drivers/base/regmap/regmap.c:2591:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write':
/kisskb/src/drivers/base/regmap/regmap.c:1852:6: warning: 'ret' 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:331:21: note: 'pdeo' was declared here
/kisskb/src/kernel/futex.c: In function 'do_futex':
/kisskb/src/kernel/futex.c:1676:3: warning: 'oldval' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/futex.c:1651:6: note: 'oldval' was declared here
/kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq':
/kisskb/src/drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c:227:19: note: 'i' was declared here
/kisskb/src/drivers/usb/core/devio.c: In function 'async_completed':
/kisskb/src/drivers/usb/core/devio.c:616:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized]
WARNING: vmlinux.o(.text+0x302a): Section mismatch in reference from the variable start_here_multiplatform to the function .init.text:.early_setup()
The function start_here_multiplatform() references
the function __init .early_setup().
This is often because start_here_multiplatform lacks a __init 
annotation or the annotation of .early_setup is wrong.

Completed OK
# rm -rf /kisskb/build/linus_maple_defconfig_powerpc-gcc4.6
# Build took: 0:01:14.302069