libperf: Move mask setup to perf_evlist__mmap_ops()

Move the mask setup to perf_evlist__mmap_ops(), because it's the same on
both perf and libperf path.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20191017105918.20873-4-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/lib/evlist.c

@@ -578,6 +578,8 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
 	if (!ops || !ops->get || !ops->mmap)
 		return -EINVAL;
 
+	mp->mask = evlist->mmap_len - page_size - 1;
+
 	evlist->nr_mmaps = perf_evlist__nr_mmaps(evlist);
 
 	perf_evlist__for_each_entry(evlist, evsel) {
@@ -605,7 +607,6 @@ int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
 	};
 
 	evlist->mmap_len = (pages + 1) * page_size;
-	mp.mask = evlist->mmap_len - page_size - 1;
 
 	return perf_evlist__mmap_ops(evlist, &ops, &mp);
 }

tools/perf/util/evlist.c

@@ -813,7 +813,6 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
 
 	evlist->core.mmap_len = evlist__mmap_size(pages);
 	pr_debug("mmap size %zuB\n", evlist->core.mmap_len);
-	mp.core.mask = evlist->core.mmap_len - page_size - 1;
 
 	auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len,
 				   auxtrace_pages, auxtrace_overwrite);