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MIPS: SMP: Allow boot_secondary SMP op to return errors

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Allow the boot_secondary SMP op to return an error to __cpu_up(), which
will in turn return it to its caller.

This will allow SMP implementations to return errors quickly in cases
they they know have failed, rather than relying upon __cpu_up()
eventually timing out waiting for the cpu_running completion.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17014/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton
2017-08-12 19:49:40 -07:00
committed by Ralf Baechle
parent 68923cdc2e
commit d595d423d0
14 changed files with 37 additions and 15 deletions
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arch/mips/include/asm/smp-ops.h
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@@ -26,7 +26,7 @@ struct plat_smp_ops {
void (*send_ipi_mask)(const struct cpumask *mask, unsigned int action);
void (*init_secondary)(void);
void (*smp_finish)(void);
void (*boot_secondary)(int cpu, struct task_struct *idle);
int (*boot_secondary)(int cpu, struct task_struct *idle);
void (*smp_setup)(void);
void (*prepare_cpus)(unsigned int max_cpus);
#ifdef CONFIG_HOTPLUG_CPU