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authorLeo Yan <leo.yan@linaro.org>2021-04-28 20:09:13 +0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2021-04-29 10:31:00 -0300
commitaa616f5a8a2d22a179d5502ebd85045af66fa656 (patch)
treea00f3b386bfbf16051155880d149a43329348667 /drivers/spmi
parente1d380ea8b00db4bb14d1f513000d4b62aa9d3f0 (diff)
downloadlinux-aa616f5a8a2d22a179d5502ebd85045af66fa656.tar.bz2
perf jit: Let convert_timestamp() to be backwards-compatible
Commit d110162cafc80dad ("perf tsc: Support cap_user_time_short for event TIME_CONV") supports the extended parameters for event TIME_CONV, but it broke the backwards compatibility, so any perf data file with old event format fails to convert timestamp. This patch introduces a helper event_contains() to check if an event contains a specific member or not. For the backwards-compatibility, if the event size confirms the extended parameters are supported in the event TIME_CONV, then copies these parameters. Committer notes: To make this compiler backwards compatible add this patch: - struct perf_tsc_conversion tc = { 0 }; + struct perf_tsc_conversion tc = { .time_shift = 0, }; Fixes: d110162cafc8 ("perf tsc: Support cap_user_time_short for event TIME_CONV") Signed-off-by: Leo Yan <leo.yan@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Gustavo A. R. Silva <gustavoars@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steve MacLean <Steve.MacLean@Microsoft.com> Cc: Yonatan Goldschmidt <yonatan.goldschmidt@granulate.io> Link: https://lore.kernel.org/r/20210428120915.7123-3-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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