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perf mmap: Simplify perf_mmap__read_init()

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It isn't necessary to pass the 'start', 'end' and 'overwrite' arguments
to perf_mmap__read_init().  The data is stored in the struct perf_mmap.

Discard the parameters.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1520350567-80082-8-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Kan Liang 2018-03-06 10:36:07 -05:00 • committed by Arnaldo Carvalho de Melo
parent 0019dc87b9
commit b9bae2c841
17 changed files with 18 additions and 40 deletions
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3
tools/perf/builtin-kvm.c
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@ -746,14 +746,13 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
struct perf_evlist *evlist = kvm->evlist;
union perf_event *event;
struct perf_mmap *md;
u64 end, start;
u64 timestamp;
s64 n = 0;
int err;
*mmap_time = ULLONG_MAX;
md = &evlist->mmap[idx];
err = perf_mmap__read_init(md, false, &start, &end);
err = perf_mmap__read_init(md);
if (err < 0)
return (err == -EAGAIN) ? 0 : -1;