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authorCody P Schafer <cody@linux.vnet.ibm.com>2013-07-03 15:02:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:07:29 -0700
commit114d4b79f7e561fd76fb98eba79e18df7cdd60f0 (patch)
tree20d1e2b060b4272e9a18894538d6beb551d5b7c8 /include
parent72c3b51bda557ab38d6c5b2af750c27cba15f828 (diff)
mmzone: note that node_size_lock should be manipulated via pgdat_resize_lock()
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mmzone.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 9ec7cffcae21..e511f9429f1e 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -733,6 +733,9 @@ 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;