From: Jack Steiner <steiner@sgi.com>
Date: Mon, 16 Oct 2006 17:56:54 +0000 (-0500)
Subject: [IA64] - Allow IPIs in timer loop
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=accaddb27a2d544e38e10ff2a2782b33bbbad913;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[IA64] - Allow IPIs in timer loop

Allow pending IPIs to interrupt a timer interrupt that is looping
in the do_timer() "while" loop in timer_interrupt(). (Interrupts are
allowed at only 1 spot in the code).

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---

diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 41169a9bc301..39e0cd3a0884 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -84,6 +84,12 @@ timer_interrupt (int irq, void *dev_id)
 
 		if (time_after(new_itm, ia64_get_itc()))
 			break;
+
+		/*
+		 * Allow IPIs to interrupt the timer loop.
+		 */
+		local_irq_enable();
+		local_irq_disable();
 	}
 
 	do {