[PATCH 01/39] parisc: simplify smp_prepare_boot_cpu()
"Russell King (Oracle)" <[email protected]>
| Newsgroups | gmane.linux.ports.parisc,gmane.linux.power-management.general,gmane.linux.acpi.devel,gmane.linux.kernel.cross-arch,gmane.linux.kernel,gmane.linux.ports.arm.kernel,gmane.linux.ports.riscv,gmane.linux.documentation,gmane.linux.ports.ia64 |
|---|---|
| Message-ID | <[email protected]> |
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) <[email protected]>
---
arch/parisc/kernel/smp.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 2019c1f04bd0..444154271f23 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -404,13 +404,7 @@ static int smp_boot_one_cpu(int cpuid, struct task_struct *idle)
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);