metag: perf: fix wrap handling in delta calculation

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When calculating the delta, mask with MAX_PERIOD (24 bits) to handle
wrapping, which particularly happens with periodic sampling since the
value is intentionally set so that it will overflow soon.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>

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James Hogan 2013-02-27 16:16:38 +00:00

parent 3424dabb65

commit c43ca04b5e

1 changed files with 1 additions and 1 deletions

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arch/metag/kernel/perf/perf_event.c

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