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powerpc: Simplify cpumask api usage for cpuinfo display

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- cpumask_next can take -1 as valid argument. So simplify cpuinfo
  iterator.

- Use cpumask_last to find if this_cpu is last online CPU.

/proc/cpuinfo shows same info with patch.

Reviewed-by: Yury Norov <ynorov@nvidia.com>
Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Reviewed-by: Yury Norov <ynorov@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260427044715.559137-3-sshegde@linux.ibm.com
This commit is contained in:
Shrikanth Hegde 2026-04-27 10:17:13 +05:30 committed by Madhavan Srinivasan
parent 1ca0c82bbc
commit a66eab7a5d
1 changed files with 2 additions and 5 deletions
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7
arch/powerpc/kernel/setup-common.c
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@ -323,7 +323,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_putc(m, '\n');
/* If this is the last cpu, print the summary */
if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids)
if (cpu_id == cpumask_last(cpu_online_mask))
show_cpuinfo_summary(m);
return 0;
@ -331,10 +331,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
static void *c_start(struct seq_file *m, loff_t *pos)
{
if (*pos == 0) /* just in case, cpu 0 is not the first */
*pos = cpumask_first(cpu_online_mask);
else
*pos = cpumask_next(*pos - 1, cpu_online_mask);
*pos = cpumask_next(*pos - 1, cpu_online_mask);
if ((*pos) < nr_cpu_ids)
return (void *)(unsigned long)(*pos + 1);
return NULL;