Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

powerpc/4xx: Fix regression in SMP on 476

Browse source 
commit c56e58537d breaks SMP support in PPC_47x chip.
 secondary_ti must be set to current thread info before callin kick_cpu or else
 start_secondary_47x will jump into void when trying to return to c-code.
 In the current setup secondary_ti is initialized before the CPU idle task is started
 and only the boot core will start. I am not sure this is the correct solution, but it
 makes SMP possible in my chip.
 Note! The HOTPLUG support probably need some fixing to, There is no trampoline code
 available in head_44x.S - start_secondary_resume?

Signed-off-by: Kerstin Jonsson <kerstin.jonsson@ericsson.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
kerstin jonsson 2011-05-17 23:57:11 +00:00 committed by Benjamin Herrenschmidt
parent 35d215fbe4
commit c560bbceaf
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
arch/powerpc/kernel/smp.c
View file

@ -410,8 +410,6 @@ int __cpuinit __cpu_up(unsigned int cpu)
{ {
int rc, c; int rc, c;
secondary_ti = current_set[cpu];
if (smp_ops == NULL || if (smp_ops == NULL ||
(smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu))) (smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu)))
return -EINVAL; return -EINVAL;
@ -421,6 +419,8 @@ int __cpuinit __cpu_up(unsigned int cpu)
if (rc) if (rc)
return rc; return rc;
secondary_ti = current_set[cpu];
/* Make sure callin-map entry is 0 (can be leftover a CPU /* Make sure callin-map entry is 0 (can be leftover a CPU
* hotplug * hotplug
*/ */