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-rw-r--r--include/blkdev.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/blkdev.h b/include/blkdev.h
index 8065acc1e..1f0fe674e 100644
--- a/include/blkdev.h
+++ b/include/blkdev.h
@@ -21,6 +21,7 @@
#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
+/* ioctls introduced in 2.2.16, removed in 2.5.58 */
#define BLKELVGET _IOR(0x12,106,size_t) /* elevator get */
#define BLKELVSET _IOW(0x12,107,size_t) /* elevator set */