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-rw-r--r--mm/percpu.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/percpu.c b/mm/percpu.c
index f921fdfb5430..ac5c626b44a9 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1650,6 +1650,16 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
areas[group] = ptr;
base = min(ptr, base);
+ }
+
+ /*
+ * Copy data and free unused parts. This should happen after all
+ * allocations are complete; otherwise, we may end up with
+ * overlapping groups.
+ */
+ for (group = 0; group < ai->nr_groups; group++) {
+ struct pcpu_group_info *gi = &ai->groups[group];
+ void *ptr = areas[group];
for (i = 0; i < gi->nr_units; i++, ptr += ai->unit_size) {
if (gi->cpu_map[i] == NR_CPUS) {