sched/x86: Update reschedule warning text

Modify the reschedule warning to output the offline CPU number and
use a better debug message.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1492518305-3808-1-git-send-email-prarit@redhat.com
[ Tweaked the warning message. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index d3c66a15bbde00e254461922a5a0cb8f1018c166..3cab8415389a9ac445998ce8995142f4ae1be4f4 100644 (file)
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -124,7 +124,7 @@ static bool smp_no_nmi_ipi = false;
 static void native_smp_send_reschedule(int cpu)
 {
        if (unlikely(cpu_is_offline(cpu))) {
-               WARN_ON(1);
+               WARN(1, "sched: Unexpected reschedule of offline CPU#%d!\n", cpu);
                return;
        }
        apic->send_IPI(cpu, RESCHEDULE_VECTOR);