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parisc: simplify smp_prepare_boot_cpu() 

smp_prepare_boot_cpu() reads the cpuid of the first CPU, printing a
message to state which processor booted, and setting it online and
present.

This cpuid is retrieved from per_cpu(cpu_data, 0).cpuid, which is
initialised in arch/parisc/kernel/processor.c:processor_probe() thusly:

	p = &per_cpu(cpu_data, cpuid);
...
	p->cpuid = cpuid;	/* save CPU id */

Consequently, the cpuid retrieved seems to be guaranteed to also be
zero, meaning that the message printed in this boils down to:

	pr_info("SMP: bootstrap CPU ID is 0\n");

Moreover, since kernel/cpu.c::boot_cpu_init() already sets CPU 0 to
be present and online, there is no need to do this again in
smp_prepare_boot_cpu().

Remove this code, and simplify the printk().

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Russell King (Oracle) 2023-10-20 15:45:30 +01:00 committed by Helge Deller
parent 86bb854d13
commit 1c7431b39a
1 changed files with 1 additions and 7 deletions
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8
arch/parisc/kernel/smp.c
View File

@ -404,13 +404,7 @@ alive:
void __init smp_prepare_boot_cpu(void)
{
int bootstrap_processor = per_cpu(cpu_data, 0).cpuid;
/* Setup BSP mappings */
printk(KERN_INFO "SMP: bootstrap CPU ID is %d\n", bootstrap_processor);
set_cpu_online(bootstrap_processor, true);
set_cpu_present(bootstrap_processor, true);
pr_info("SMP: bootstrap CPU ID is 0\n");
}