Commit 78e5a3399421 ("cpumask: fix checking valid cpu range") has
started issuing warnings when reading /proc/cpuinfo and config
DEBUG_PER_CPU_MAPS is enabled. Avoid calling cpumask_next() with
the cpu index equal to nr_cpu_ids - 1 and ensure no warning is
generated.
Link: https://lore.kernel.org/r/20221012081905.1800640-1-ajones@xxxxxxxxxxxxxxxx
Reported-by: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
---
arch/s390/kernel/processor.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index a194611ba88c..908a0be900ea 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -334,6 +334,8 @@ static int show_cpuinfo(struct seq_file *m, void *v)
static inline void *c_update(loff_t *pos)
{
+ if (*pos >= nr_cpu_ids)
+ return NULL;
if (*pos)
*pos = cpumask_next(*pos - 1, cpu_online_mask);
else
--
2.34.1
