In pcpu_setup_first_chunk() pcpu_reserved_chunk is assigned to point to
static chunk. While pcpu_first_chunk is got from below code:
pcpu_first_chunk = dchunk ?: schunk;
pcpu_first_chunk might point to static chunk too with possibility. Add a
WARN_ON here to yell out if that happened.*/
Signed-off-by: Baoquan He <[email protected]>
---
mm/percpu.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/mm/percpu.c b/mm/percpu.c
index 8cf18dc..974600b 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -2275,6 +2275,13 @@ void __init percpu_init_late(void)
unsigned long flags;
int i;
+ /* In pcpu_setup_first_chunk() pcpu_reserved_chunk is assigned to point
to
+ * static chunk. While pcpu_first_chunk is got from below code:
+ * pcpu_first_chunk = dchunk ?: schunk;
+ * pcpu_first_chunk might point to static chunk too with possibility.
Add a
+ * WARN_ON here to yell out if that happened.*/
+ WARN_ON(pcpu_first_chunk == pcpu_reserved_chunk);
+
for (i = 0; (chunk = target_chunks[i]); i++) {
int *map;
const size_t size = PERCPU_DYNAMIC_EARLY_SLOTS * sizeof(map[0]);
--
2.4.3
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