Unverified Commit 2c865620 authored by Thomas Bogendoerfer's avatar Thomas Bogendoerfer Committed by Paul Burton
Browse files

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: default avatarThomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: default avatarPaul 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
parent 9707b7e6

arch/mips/include/asm/smp-ops.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

arch/mips/kernel/smp.c

+2 −0
Original line number Diff line number Diff line
@@ -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);

}

arch/mips/sgi-ip27/ip27-init.c

+0 −1
Original line number Diff line number Diff line
@@ -212,7 +212,6 @@ void __init plat_mem_setup(void) 
#endif



	ioc3_eth_init();

	per_cpu_init();



	set_io_port_base(IO_BASE);

}

arch/mips/sgi-ip27/ip27-smp.c

+3 −2
Original line number Diff line number Diff line
@@ -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,

};

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