panic, smp: provide smp_send_stop() wrapper on UP too

Impact: cleanup, no code changed

Remove an ugly #ifdef CONFIG_SMP from panic(), by providing
an smp_send_stop() wrapper on UP too.

LKML-Reference: <49B91A7E.76E4.0078.0@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

include/linux/smp.h

@@ -38,7 +38,7 @@ int smp_call_function_single(int cpuid, void (*func) (void *info), void *info,
 /*
  * main cross-CPU interfaces, handles INIT, TLB flush, STOP, etc.
  * (defined in asm header):
- */ 
+ */
 
 /*
  * stops all CPUs but the current one:
@@ -122,6 +122,8 @@ extern unsigned int setup_max_cpus;
 
 #else /* !SMP */
 
+static inline void smp_send_stop(void) { }
+
 /*
  *	These macros fold the SMP functionality into a single CPU system
  */