diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 3b18d7d..14d6f70 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -129,6 +129,17 @@ struct mtd_info {
 	 */
 	u_int32_t writesize;
 
+	/*
+	 * Size of the write buffer used by the MTD. MTD devices having a write
+	 * buffer can write multiple writesize chunks at a time. E.g. while
+	 * writing 4 * writesize bytes to a device with 2 * writesize bytes
+	 * buffer the MTD driver can (but doesn't have to) do 2 writesize
+	 * operations, but not 4. Currently, all NANDs have writebufsize
+	 * equivalent to writesize (NAND page size). Some NOR flashes do have
+	 * writebufsize greater than writesize.
+	 */
+	u_int32_t writebufsize;
+
 	u_int32_t oobsize;   /* Amount of OOB data per block (e.g. 16) */
 	u_int32_t oobavail;  /* Available OOB bytes per block */