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powerpc/85xx: Minor fixups for kexec on 85xx 

Make kexec_down_cpus atmoic since it will be incremented by all cores as
they are coming down.

Remove duplicate calls to mpc85xx_smp_kexec_down, now it's called by the
crash and normal kexec pathway only once.

Increase the timeout to wait for other cores to shutdown.

Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Matthew McClintock 2010-09-16 17:58:25 -05:00 committed by Kumar Gala
parent edb8580010
commit 5d69296163
1 changed files with 11 additions and 13 deletions
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24
arch/powerpc/platforms/85xx/smp.c
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@ -121,17 +121,15 @@ struct smp_ops_t smp_85xx_ops = {
};
#ifdef CONFIG_KEXEC
static int kexec_down_cpus = 0;
atomic_t kexec_down_cpus = ATOMIC_INIT(0);
void mpc85xx_smp_kexec_cpu_down(int crash_shutdown, int secondary)
{
/* When crashing, this gets called on all CPU's we only
* take down the non-boot cpus */
if (smp_processor_id() != boot_cpuid)
{
local_irq_disable();
kexec_down_cpus++;
local_irq_disable();
if (secondary) {
atomic_inc(&kexec_down_cpus);
/* loop forever */
while (1);
}
}
@ -144,14 +142,14 @@ static void mpc85xx_smp_kexec_down(void *arg)
static void mpc85xx_smp_machine_kexec(struct kimage *image)
{
int timeout = 2000;
int i;
int timeout = INT_MAX;
int i, num_cpus = num_present_cpus();
set_cpus_allowed(current, cpumask_of_cpu(boot_cpuid));
smp_call_function(mpc85xx_smp_kexec_down, NULL, 0);
if (image->type == KEXEC_TYPE_DEFAULT)
smp_call_function(mpc85xx_smp_kexec_down, NULL, 0);
while ( (kexec_down_cpus != (num_online_cpus() - 1)) &&
while ( (atomic_read(&kexec_down_cpus) != (num_cpus - 1)) &&
( timeout > 0 ) )
{
timeout--;
@ -160,7 +158,7 @@ static void mpc85xx_smp_machine_kexec(struct kimage *image)
if ( !timeout )
printk(KERN_ERR "Unable to bring down secondary cpu(s)");
for (i = 0; i < num_present_cpus(); i++)
for (i = 0; i < num_cpus; i++)
{
if ( i == smp_processor_id() ) continue;
mpic_reset_core(i);