perf kmem: Print usage help for unknown commands

This patch fixes "perf kmem" to print usage help instead of
doing nothing.

Signed-off-by: Pekka Enberg <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Li Zefan <[email protected]>
Cc: Xiao Guangrong <[email protected]>
LKML-Reference: <1263921971[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index 33bb9dfb8e68e46df5152b0baf8b53e5abae047d..93c67bf53d2c96e391a649989ab6597728063b1c 100644 (file)
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -784,7 +784,8 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __used)
                        setup_sorting(&alloc_sort, default_sort_order);
 
                return __cmd_kmem();
-       }
+       } else
+               usage_with_options(kmem_usage, kmem_options);
 
        return 0;
 }