# git rev-parse -q --verify 6ad7cbc01527223f3f92baac9b122f15651cf76b^{commit}
6ad7cbc01527223f3f92baac9b122f15651cf76b
already have revision, skipping fetch
# git checkout -q -f -B kisskb 6ad7cbc01527223f3f92baac9b122f15651cf76b
# git clean -qxdf
# < git log -1
# commit 6ad7cbc01527223f3f92baac9b122f15651cf76b
# Author: Nathan Huckleberry <nhuck@google.com>
# Date:   Sat Aug 22 23:56:18 2020 +0900
# 
#     Makefile: Add clang-tidy and static analyzer support to makefile
#     
#     This patch adds clang-tidy and the clang static-analyzer as make
#     targets. The goal of this patch is to make static analysis tools
#     usable and extendable by any developer or researcher who is familiar
#     with basic c++.
#     
#     The current static analysis tools require intimate knowledge of the
#     internal workings of the static analysis. Clang-tidy and the clang
#     static analyzers expose an easy to use api and allow users unfamiliar
#     with clang to write new checks with relative ease.
#     
#     ===Clang-tidy===
#     
#     Clang-tidy is an easily extendable 'linter' that runs on the AST.
#     Clang-tidy checks are easy to write and understand. A check consists of
#     two parts, a matcher and a checker. The matcher is created using a
#     domain specific language that acts on the AST
#     (https://clang.llvm.org/docs/LibASTMatchersReference.html).  When AST
#     nodes are found by the matcher a callback is made to the checker. The
#     checker can then execute additional checks and issue warnings.
#     
#     Here is an example clang-tidy check to report functions that have calls
#     to local_irq_disable without calls to local_irq_enable and vice-versa.
#     Functions flagged with __attribute((annotation("ignore_irq_balancing")))
#     are ignored for analysis. (https://reviews.llvm.org/D65828)
#     
#     ===Clang static analyzer===
#     
#     The clang static analyzer is a more powerful static analysis tool that
#     uses symbolic execution to find bugs. Currently there is a check that
#     looks for potential security bugs from invalid uses of kmalloc and
#     kfree. There are several more general purpose checks that are useful for
#     the kernel.
#     
#     The clang static analyzer is well documented and designed to be
#     extensible.
#     (https://clang-analyzer.llvm.org/checker_dev_manual.html)
#     (https://github.com/haoNoQ/clang-analyzer-guide/releases/download/v0.1/clang-analyzer-guide-v0.1.pdf)
#     
#     The main draw of the clang tools is how accessible they are. The clang
#     documentation is very nice and these tools are built specifically to be
#     easily extendable by any developer. They provide an accessible method of
#     bug-finding and research to people who are not overly familiar with the
#     kernel codebase.
#     
#     Signed-off-by: Nathan Huckleberry <nhuck@google.com>
#     Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
#     Tested-by: Nick Desaulniers <ndesaulniers@google.com>
#     Tested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
#     Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 6ad7cbc01527223f3f92baac9b122f15651cf76b
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_PERF_EVENTS=n
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5
# Build took: 0:03:06.082173