From: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Date: Fri, 1 Jul 2005 12:46:26 +0000 (+0400)
Subject: [PATCH] alpha smp fix (part #2)
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4a89a04f1ee21a7c1f4413f1ad7dcfac50ff9b63;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] alpha smp fix (part #2)

This fixes the bug that caused BUG_ON(!irqs_disabled()) to trigger in
run_posix_cpu_timers() on alpha/smp.  We didn't disable interrupts
properly before calling smp_percpu_timer_interrupt().

We *do* disable interrupts everywhere except this unfortunate
smp_percpu_timer_interrupt().  Fixed thus.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/alpha/kernel/irq_alpha.c b/arch/alpha/kernel/irq_alpha.c
index e6ded33c6e22..9d34ce26e5ef 100644
--- a/arch/alpha/kernel/irq_alpha.c
+++ b/arch/alpha/kernel/irq_alpha.c
@@ -55,6 +55,8 @@ do_entInt(unsigned long type, unsigned long vector,
 #ifdef CONFIG_SMP
 	  {
 		long cpu;
+
+		local_irq_disable();
 		smp_percpu_timer_interrupt(regs);
 		cpu = smp_processor_id();
 		if (cpu != boot_cpuid) {