# git rev-parse -q --verify 6116dea80dfd5b8d3825bf7f2e44a8bc2730f3d0^{commit}
6116dea80dfd5b8d3825bf7f2e44a8bc2730f3d0
already have revision, skipping fetch
# git checkout -q -f -B kisskb 6116dea80dfd5b8d3825bf7f2e44a8bc2730f3d0
# git clean -qxdf
# < git log -1
# commit 6116dea80dfd5b8d3825bf7f2e44a8bc2730f3d0
# Merge: 21d2f6850c09 440ab9e10e2e
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Jun 27 08:53:49 2020 -0700
# 
#     Merge tag 'kgdb-5.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux
#     
#     Pull kgdb fixes from Daniel Thompson:
#      "The main change here is a fix for a number of unsafe interactions
#       between kdb and the console system. The fixes are specific to kdb
#       (pure kgdb debugging does not use the console system at all). On
#       systems with an NMI then kdb, if it is enabled, must get messages to
#       the user despite potentially running from some "difficult" calling
#       contexts. These fixes avoid using the console system where we have
#       been provided an alternative (safer) way to interact with the user
#       and, if using the console system in unavoidable, use oops_in_progress
#       for deadlock avoidance. These fixes also ensure kdb honours the
#       console enable flag.
#     
#       Also included is a fix that wraps kgdb trap handling in an RCU read
#       lock to avoids triggering diagnostic warnings. This is a wide lock
#       scope but this is OK because kgdb is a stop-the-world debugger. When
#       we stop the world we put all the CPUs into holding pens and this
#       inhibits RCU update anyway"
#     
#     * tag 'kgdb-5.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux:
#       kgdb: Avoid suspicious RCU usage warning
#       kdb: Switch to use safer dbg_io_ops over console APIs
#       kdb: Make kdb_printf() console handling more robust
#       kdb: Check status of console prior to invoking handlers
#       kdb: Re-factor kdb_printf() message write code
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 6116dea80dfd5b8d3825bf7f2e44a8bc2730f3d0
# < make -s -j 48 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 defconfig
# < make -s -j 48 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 help
# make -s -j 48 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig
# make -s -j 48 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 
/kisskb/src/arch/um/os-Linux/signal.c: In function 'sig_handler_common':
/kisskb/src/arch/um/os-Linux/signal.c:51:1: warning: the frame size of 2960 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/arch/um/os-Linux/signal.c: In function 'timer_real_alarm_handler':
/kisskb/src/arch/um/os-Linux/signal.c:95:1: warning: the frame size of 2960 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
  LINK linux
Completed OK
# rm -rf /kisskb/build/linus_um-defconfig_um-x86_64
# Build took: 0:00:48.434079