kdb: add usage string of 'per_cpu' command

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index 38a8542..6bc6e3b 100644 (file)
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -2892,7 +2892,7 @@ static void __init kdb_inittab(void)
          "Send a signal to a process", 0, KDB_REPEAT_NONE);
        kdb_register_repeat("summary", kdb_summary, "",
          "Summarize the system", 4, KDB_REPEAT_NONE);
-       kdb_register_repeat("per_cpu", kdb_per_cpu, "",
+       kdb_register_repeat("per_cpu", kdb_per_cpu, "<sym> [<bytes>] [<cpu>]",
          "Display per_cpu variables", 3, KDB_REPEAT_NONE);
        kdb_register_repeat("grephelp", kdb_grep_help, "",
          "Display help on | grep", 0, KDB_REPEAT_NONE);