block: add support for limiting gaps in SG lists

[mirror_ubuntu-zesty-kernel.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 713f8b62b435ea2cd2d273fc02c2b39520886d7d..8699bcf5f0999db98a8f2a2917c284d950a12d75 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -512,6 +512,7 @@ struct request_queue {
 #define QUEUE_FLAG_DEAD        19      /* queue tear-down finished */
 #define QUEUE_FLAG_INIT_DONE   20      /* queue is initialized */
 #define QUEUE_FLAG_NO_SG_MERGE 21      /* don't attempt to merge SG segments*/
+#define QUEUE_FLAG_SG_GAPS     22      /* queue doesn't support SG gaps */
 
 #define QUEUE_FLAG_DEFAULT     ((1 << QUEUE_FLAG_IO_STAT) |            \
                                 (1 << QUEUE_FLAG_STACKABLE)    |       \