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005ef2b41b
The msan reported a use-of-uninitialized-value warning for the struct lock_contention_data in lock_contention_read(). While it'd be filled by bpf_map_lookup_elem(), let's just initialize it to silence the warning. ==12524==WARNING: MemorySanitizer: use-of-uninitialized-value #0 0x562b0f16b1cd in lock_contention_read util/bpf_lock_contention.c:139:7 #1 0x562b0ef65ec6 in __cmd_contention builtin-lock.c:1737:3 #2 0x562b0ef65ec6 in cmd_lock builtin-lock.c:1992:8 #3 0x562b0ee7f50b in run_builtin perf.c:322:11 #4 0x562b0ee7efc1 in handle_internal_command perf.c:376:8 #5 0x562b0ee7e1e9 in run_argv perf.c:420:2 #6 0x562b0ee7e1e9 in main perf.c:550:3 #7 0x7f065f10e632 in __libc_start_main (/usr/lib64/libc.so.6+0x61632) #8 0x562b0edf2fa9 in _start (perf+0xfa9) SUMMARY: MemorySanitizer: use-of-uninitialized-value (perf+0xe15160) in lock_contention_read Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20221028180128.3311491-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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.