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selftests/livepatch: Use "comm" instead of "diff" for dmesg

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BusyBox diff doesn't support the GNU diff '--LTYPE-line-format' options
that were used in the selftests to filter older kernel log messages from
dmesg output.

Use "comm" which is more available in smaller boot environments.

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
Reviewed-by: Yannick Cote <ycote@redhat.com>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200710183745.19730-1-joe.lawrence@redhat.com
This commit is contained in:
Joe Lawrence 2020-07-10 14:37:45 -04:00 committed by Petr Mladek
parent 3fd9bd8b7e
commit 2f3f651f37
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/livepatch/functions.sh
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@ -277,7 +277,7 @@ function check_result {
# help differentiate repeated testing runs. Remove them with a
# post-comparison sed filter.
result=$(dmesg | diff --changed-group-format='%>' --unchanged-group-format='' "$SAVED_DMESG" - | \
result=$(dmesg | comm -13 "$SAVED_DMESG" - | \
grep -e 'livepatch:' -e 'test_klp' | \
grep -v '\(tainting\|taints\) kernel' | \
sed 's/^\[[ 0-9.]*\] //')