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

ARM: SMP: wait for CPU to be marked active

Browse Source 
When we bring a CPU online, we should wait for it to become active
before entering the idle thread, so we know that the scheduler and
thread migration is going to work.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2011-06-20 16:46:01 +01:00
parent 9a00318ead
commit 573619d165
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/kernel/smp.c
View File

@@ -318,9 +318,13 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
smp_store_cpu_info(cpu); smp_store_cpu_info(cpu);
/* /*
* OK, now it's safe to let the boot CPU continue * OK, now it's safe to let the boot CPU continue. Wait for
* the CPU migration code to notice that the CPU is online
* before we continue.
*/ */
set_cpu_online(cpu, true); set_cpu_online(cpu, true);
while (!cpu_active(cpu))
cpu_relax();
/* /*
* OK, it's off to the idle thread for us * OK, it's off to the idle thread for us