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| author | Matthew McClintock <msm@freescale.com> | 2010-09-16 17:58:25 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2010-10-14 00:52:50 -0500 |
| commit | 5d692961633d4ecd1ca07313b75ddf35520a4c28 (patch) | |
| tree | 4e6bbfc62a42441fa9953edbdc71500dc9fbbbde /arch/powerpc/platforms | |
| parent | edb85800101c354a395ecc5ed3b52a9499bd4cfc (diff) | |
| download | blackbird-op-linux-5d692961633d4ecd1ca07313b75ddf35520a4c28.tar.gz blackbird-op-linux-5d692961633d4ecd1ca07313b75ddf35520a4c28.zip | |
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>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/85xx/smp.c | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/arch/powerpc/platforms/85xx/smp.c b/arch/powerpc/platforms/85xx/smp.c index 2aee4b391319..c9a77fa62744 100644 --- a/arch/powerpc/platforms/85xx/smp.c +++ b/arch/powerpc/platforms/85xx/smp.c @@ -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); |
