perf tools: Check mmap pages value early

Move the check of the mmap_pages value to the options parsing time, so
we could rely on this value on other parts of code.

Related changes come in the next patches.

Also changes perf_evlist::mmap_len to proper size_t type.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1378031796-17892-2-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index be658433d3bb..f3ddbb008fb4 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1528,8 +1528,9 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
                     "list of cpus to monitor"),
         OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
                     "child tasks do not inherit counters"),
-        OPT_UINTEGER('m', "mmap-pages", &trace.opts.mmap_pages,
-                     "number of mmap data pages"),
+        OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
+                     "number of mmap data pages",
+                     perf_evlist__parse_mmap_pages),
         OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
                    "user to profile"),
         OPT_CALLBACK(0, "duration", &trace, "float",