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Filename Latest commit message Latest commit date
Alexander Kapshuk 51d8aac236 perf tools: Fix check-headers.sh AND list path of execution
The '||' path of execution in the 'test' block of the check_2() function
may also be taken if file2 does not exist, in which case the warning
message about the ABI headers being different would still be printed
where it should not be.  See below.

  % file1=file1; file2=file2
  % cmd="echo diff $file1 $file2"
  % test -f $file2 && \
    eval $cmd || echo "Warning: Kernel ABI header at 'tools/$file1'
                       differs from latest version at '$file2'" >&2
                       Warning: Kernel ABI header at 'tools/file1' differs from latest
                       version at 'file2'

The proposed patch converts the code following the '&&' operator into a
compound list to be executed in the current process environment only if file2
does exist. Should the files being compared differ, a diff command to compare
the files concerned is printed on standard output. E.g.

  $ diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S

Committer testing:

Remove a line from that tools/arch/x86/lib/memcpy_64.S file to test
this:

  BUILD:   Doing 'make -j4' parallel build
Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S'
diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S
  CC       /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180811083915.17471-1-alexander.kapshuk@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-08-13 15:46:19 -03:00
arch Merge remote-tracking branch 'tip/perf/urgent' into perf/core 2018-07-31 09:55:45 -03:00
block for-linus-20180727 2018-07-27 12:51:00 -07:00
certs
crypto
Documentation Merge remote-tracking branch 'tip/perf/urgent' into perf/core 2018-07-31 09:55:45 -03:00
drivers Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-07-30 11:37:16 -07:00
firmware
fs Some miscellaneous ext4 fixes for 4.18; one fix is for a regression 2018-07-29 13:13:45 -07:00
include Merge remote-tracking branch 'tip/perf/urgent' into perf/core 2018-07-31 09:55:45 -03:00
init
ipc ipc/sem.c: prevent queue.status tearing in semop 2018-07-26 19:38:03 -07:00
kernel Merge remote-tracking branch 'tip/perf/urgent' into perf/core 2018-07-31 09:55:45 -03:00
lib Merge remote-tracking branch 'tip/perf/urgent' into perf/core 2018-07-31 09:55:45 -03:00
LICENSES
mm zswap: re-check zswap_is_full() after do zswap_shrink() 2018-07-26 19:38:03 -07:00
net
samples
scripts
security
sound
tools perf tools: Fix check-headers.sh AND list path of execution 2018-08-13 15:46:19 -03:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-07-30 11:45:30 -07:00
Makefile Linux 4.18-rc7 2018-07-29 14:44:52 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.