[PATCH] ARM: Don't try to send IPI on UP systems with CONFIG_SMP
Tony Lindgren
tony at atomide.com
Tue Sep 7 23:14:05 EDT 2010
This is not needed on UP. Additionally with will cause issues when
booting CONFIG_SMP_ON_UP kernel on earlier ARM cores.
Signed-off-by: Tony Lindgren <tony at atomide.com>
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 401e38b..5facdbe 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -207,9 +207,7 @@ __setup("reboot=", reboot_setup);
void machine_shutdown(void)
{
-#ifdef CONFIG_SMP
smp_send_stop();
-#endif
}
void machine_halt(void)
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 40dc74f..16ca27b 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -560,12 +560,17 @@ asmlinkage void __exception do_IPI(struct pt_regs *regs)
void smp_send_reschedule(int cpu)
{
- send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE);
+ if (is_smp())
+ send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE);
}
void smp_send_stop(void)
{
cpumask_t mask = cpu_online_map;
+
+ if (!is_smp())
+ return;
+
cpu_clear(smp_processor_id(), mask);
send_ipi_message(&mask, IPI_CPU_STOP);
}
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