[PATCH v3 2/4] mmzone: note that node_size_lock should be manipulated via pgdat_resize_lock()

[Cody P Schafer]

Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
---
 include/linux/mmzone.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index fc859a0c..41557be 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -716,6 +716,9 @@ typedef struct pglist_data {
 	 * or node_spanned_pages stay constant.  Holding this will also
 	 * guarantee that any pfn_valid() stays that way.
 	 *
+	 * pgdat_resize_lock() and pgdat_resize_unlock() are provided to
+	 * manipulate node_size_lock without checking for CONFIG_MEMORY_HOTPLUG.
+	 *
 	 * Nests above zone->lock and zone->span_seqlock
 	 */
 	spinlock_t node_size_lock;
-- 
1.8.2.2

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