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-rw-r--r--arch/ia64/kernel/process.c22
1 files changed, 8 insertions, 14 deletions
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 91293388dd2..7c43aea5f7f 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -3,6 +3,7 @@
*
* Copyright (C) 1998-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
+ * 04/11/17 Ashok Raj <ashok.raj@intel.com> Added CPU Hotplug Support
*/
#define __KERNEL_SYSCALLS__ /* see <asm/unistd.h> */
#include <linux/config.h>
@@ -200,27 +201,20 @@ default_idle (void)
static inline void play_dead(void)
{
extern void ia64_cpu_local_tick (void);
+ unsigned int this_cpu = smp_processor_id();
+
/* Ack it */
__get_cpu_var(cpu_state) = CPU_DEAD;
- /* We shouldn't have to disable interrupts while dead, but
- * some interrupts just don't seem to go away, and this makes
- * it "work" for testing purposes. */
max_xtp();
local_irq_disable();
- /* Death loop */
- while (__get_cpu_var(cpu_state) != CPU_UP_PREPARE)
- cpu_relax();
-
+ idle_task_exit();
+ ia64_jump_to_sal(&sal_boot_rendez_state[this_cpu]);
/*
- * Enable timer interrupts from now on
- * Not required if we put processor in SAL_BOOT_RENDEZ mode.
+ * The above is a point of no-return, the processor is
+ * expected to be in SAL loop now.
*/
- local_flush_tlb_all();
- cpu_set(smp_processor_id(), cpu_online_map);
- wmb();
- ia64_cpu_local_tick ();
- local_irq_enable();
+ BUG();
}
#else
static inline void play_dead(void)