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[ Upstream commit0dd1f81554] Running shellcheck on lock_contention.sh generates below warning: In stat_bpf_counters_cgrp.sh line 28: if [ -d /sys/fs/cgroup/system.slice -a -d /sys/fs/cgroup/user.slice ]; then ^-- SC2166 (warning): Prefer [ p ] && [ q ] as [ p -a q ] is not well defined. In stat_bpf_counters_cgrp.sh line 34: local self_cgrp=$(grep perf_event /proc/self/cgroup | cut -d: -f3) ^-------------^ SC3043 (warning): In POSIX sh, 'local' is undefined. ^-------^ SC2155 (warning): Declare and assign separately to avoid masking return values. ^-- SC2046 (warning): Quote this to prevent word splitting. In stat_bpf_counters_cgrp.sh line 51: local output ^----------^ SC3043 (warning): In POSIX sh, 'local' is undefined. In stat_bpf_counters_cgrp.sh line 65: local output ^----------^ SC3043 (warning): In POSIX sh, 'local' is undefined. Fixed above warnings by: - Changing the expression [p -a q] to [p] && [q]. - Fixing shellcheck warnings for local usage, by prefixing function name to the variable. Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Acked-by: Ian Rogers <irogers@google.com> Cc: Disha Goel <disgoel@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: linuxppc-dev@lists.ozlabs.org Link: https://lore.kernel.org/r/20230709182800.53002-6-atrajeev@linux.vnet.ibm.com Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Stable-dep-of:a84260e314("perf test stat_bpf_counters_cgrp: Enhance perf stat cgroup BPF counter test") Signed-off-by: Sasha Levin <sashal@kernel.org>
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.
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.