perf top: Ignore kptr_restrict when not sampling the kernel

If all events have attr.exclude_kernel set, no need to look at
kptr_restrict.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-yegpzg5bf2im69g0tfizqaqz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 477a8699f0b5..1b01c277bab9 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -732,14 +732,16 @@ static void perf_event__process_sample(struct perf_tool *tool,
         if (!machine->kptr_restrict_warned &&
             symbol_conf.kptr_restrict &&
             al.cpumode == PERF_RECORD_MISC_KERNEL) {
-                ui__warning(
+                if (!perf_evlist__exclude_kernel(top->session->evlist)) {
+                        ui__warning(
 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
 "Check /proc/sys/kernel/kptr_restrict.\n\n"
 "Kernel%s samples will not be resolved.\n",
                           al.map && !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
                           " modules" : "");
-                if (use_browser <= 0)
-                        sleep(5);
+                        if (use_browser <= 0)
+                                sleep(5);
+                }
                 machine->kptr_restrict_warned = true;
         }