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tools headers UAPI: Sync linux/perf_event.h with the kernel sources 

To pick the trivial change in:

  ddecd22878 ("perf: uapi: Document perf_event_attr::sig_data truncation on 32 bit architectures")

Just adds a comment.

This silences this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' differs from latest version at 'include/uapi/linux/perf_event.h'
  diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h

Cc: Marco Elver <elver@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/lkml/
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2021-05-21 16:00:31 -03:00
parent de9f498d2b
commit 714b8b7131
1 changed files with 2 additions and 0 deletions
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2
tools/include/uapi/linux/perf_event.h
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@ -465,6 +465,8 @@ struct perf_event_attr {
/*
* User provided data if sigtrap=1, passed back to user via
* siginfo_t::si_perf_data, e.g. to permit user to identify the event.
* Note, siginfo_t::si_perf_data is long-sized, and sig_data will be
* truncated accordingly on 32 bit architectures.
*/
__u64 sig_data;
};