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    Subject[PATCH 4.9 022/141] perf cpu_map: Align cpu map synthesized events properly.
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: David Miller <davem@davemloft.net>

    [ Upstream commit 0ed149cf5239cc6e7e65bf00f769e8f1e91076c0 ]

    The size of the resulting cpu map can be smaller than a multiple of
    sizeof(u64), resulting in SIGBUS on cpus like Sparc as the next event
    will not be aligned properly.

    Signed-off-by: David S. Miller <davem@davemloft.net>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Kan Liang <kan.liang@intel.com>
    Fixes: 6c872901af07 ("perf cpu_map: Add cpu_map event synthesize function")
    Link: http://lkml.kernel.org/r/20181011.224655.716771175766946817.davem@davemloft.net
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    tools/perf/util/event.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/tools/perf/util/event.c
    +++ b/tools/perf/util/event.c
    @@ -839,6 +839,7 @@ void *cpu_map_data__alloc(struct cpu_map
    }

    *size += sizeof(struct cpu_map_data);
    + *size = PERF_ALIGN(*size, sizeof(u64));
    return zalloc(*size);
    }


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