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MIPS: SGI-IP27: do boot CPU init later 

To make use of per_cpu variables in interrupt code per_cpu_init() must
be done after setup_per_cpu_areas(). This is achieved by calling it
in smp_prepare_boot_cpu() via a new smp_ops method.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
This commit is contained in:
Thomas Bogendoerfer 2019-02-19 16:57:19 +01:00 committed by Paul Burton
parent 9707b7e639
commit 2c86562047
No known key found for this signature in database
GPG Key ID: 3EA79FACB57500DD
4 changed files with 6 additions and 3 deletions
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1
arch/mips/include/asm/smp-ops.h
View File

@ -29,6 +29,7 @@ struct plat_smp_ops {
int (*boot_secondary)(int cpu, struct task_struct *idle);
void (*smp_setup)(void);
void (*prepare_cpus)(unsigned int max_cpus);
void (*prepare_boot_cpu)(void);
#ifdef CONFIG_HOTPLUG_CPU
int (*cpu_disable)(void);
void (*cpu_die)(unsigned int cpu);

2
arch/mips/kernel/smp.c
View File

@ -444,6 +444,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
/* preload SMP state for boot cpu */
void smp_prepare_boot_cpu(void)
{
if (mp_ops->prepare_boot_cpu)
mp_ops->prepare_boot_cpu();
set_cpu_possible(0, true);
set_cpu_online(0, true);
}

1
arch/mips/sgi-ip27/ip27-init.c
View File

@ -212,7 +212,6 @@ void __init plat_mem_setup(void)
#endif
ioc3_eth_init();
per_cpu_init();
set_io_port_base(IO_BASE);
}

5
arch/mips/sgi-ip27/ip27-smp.c
View File

@ -177,7 +177,7 @@ static void ip27_send_ipi_mask(const struct cpumask *mask, unsigned int action)
ip27_send_ipi_single(i, action);
}
static void ip27_init_secondary(void)
static void ip27_init_cpu(void)
{
per_cpu_init();
}
@ -235,9 +235,10 @@ static void __init ip27_prepare_cpus(unsigned int max_cpus)
const struct plat_smp_ops ip27_smp_ops = {
.send_ipi_single = ip27_send_ipi_single,
.send_ipi_mask = ip27_send_ipi_mask,
.init_secondary = ip27_init_secondary,
.init_secondary = ip27_init_cpu,
.smp_finish = ip27_smp_finish,
.boot_secondary = ip27_boot_secondary,
.smp_setup = ip27_smp_setup,
.prepare_cpus = ip27_prepare_cpus,
.prepare_boot_cpu = ip27_init_cpu,
};