kernel/stop_machine.c: fix unused variable warning

kernel/stop_machine.c: In function `cpu_stopper_thread':
kernel/stop_machine.c:265: warning: unused variable `ksym_buf'

ksym_buf[] is unused if WARN_ON() is a no-op.

Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 090c28812ce101fbd055821fe12806265bd1ed9b..3cb4a9a8ae1c63ed299b023c64d57a5f6ed06014 100644 (file)
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -262,7 +262,7 @@ repeat:
                cpu_stop_fn_t fn = work->fn;
                void *arg = work->arg;
                struct cpu_stop_done *done = work->done;
-               char ksym_buf[KSYM_NAME_LEN];
+               char ksym_buf[KSYM_NAME_LEN] __maybe_unused;
 
                __set_current_state(TASK_RUNNING);