lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ARM: CPU hotplug: ensure correct ordering of unplug

Browse Source 
Don't call idle_task_exit() with interrupts disabled, and ensure
that we have a memory barrier after interrupts are disabled but
before signalling that this CPU has shut down.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2010-11-30 12:21:30 +00:00
parent bbc81fd432
commit f36d340122
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/kernel/smp.c
View File

@@ -269,9 +269,11 @@ void __ref cpu_die(void)
{ {
unsigned int cpu = smp_processor_id(); unsigned int cpu = smp_processor_id();
local_irq_disable();
idle_task_exit(); idle_task_exit();
local_irq_disable();
mb();
/* Tell __cpu_die() that this CPU is now safe to dispose of */ /* Tell __cpu_die() that this CPU is now safe to dispose of */
complete(&cpu_died); complete(&cpu_died);