diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 382c49a42ac2ac31d0e197196fa7ac7b509740da..ab3c4491777b0a61f02b5de79ab744b827e294dc 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -198,12 +198,12 @@ xfs_buf_alloc(
 	bp->b_target = target;
 
 	/*
-	 * Set length and count_desired to the same value initially.
-	 * I/O routines should use count_desired, which will be the same in
+	 * Set length and io_length to the same value initially.
+	 * I/O routines should use io_length, which will be the same in
 	 * most cases but may be reset (e.g. XFS recovery).
 	 */
 	bp->b_length = numblks;
-	bp->b_count_desired = numblks << BBSHIFT;
+	bp->b_io_length = numblks;
 	bp->b_flags = flags;
 
 	/*
@@ -302,7 +302,7 @@ xfs_buf_allocate_memory(
 	xfs_buf_t		*bp,
 	uint			flags)
 {
-	size_t			size = bp->b_count_desired;
+	size_t			size;
 	size_t			nbytes, offset;
 	gfp_t			gfp_mask = xb_to_gfp(flags);
 	unsigned short		page_count, i;
@@ -345,6 +345,7 @@ xfs_buf_allocate_memory(
 		return error;
 
 	offset = bp->b_offset;
+	size = BBTOB(bp->b_length);
 	bp->b_flags |= _XBF_PAGES;
 
 	for (i = 0; i < bp->b_page_count; i++) {
@@ -575,7 +576,7 @@ xfs_buf_get(
 	 * that we can do IO on it.
 	 */
 	bp->b_bn = blkno;
-	bp->b_count_desired = BBTOB(bp->b_length);
+	bp->b_io_length = bp->b_length;
 
 found:
 	if (!(bp->b_flags & XBF_MAPPED)) {
@@ -718,7 +719,7 @@ xfs_buf_set_empty(
 	bp->b_page_count = 0;
 	bp->b_addr = NULL;
 	bp->b_length = numblks;
-	bp->b_count_desired = numblks << BBSHIFT;
+	bp->b_io_length = numblks;
 	bp->b_bn = XFS_BUF_DADDR_NULL;
 	bp->b_flags &= ~XBF_MAPPED;
 }
@@ -770,7 +771,7 @@ xfs_buf_associate_memory(
 		pageaddr += PAGE_SIZE;
 	}
 
-	bp->b_count_desired = len;
+	bp->b_io_length = BTOBB(len);
 	bp->b_length = BTOBB(buflen);
 	bp->b_flags |= XBF_MAPPED;
 
@@ -1012,9 +1013,8 @@ xfs_buf_ioerror_alert(
 	const char		*func)
 {
 	xfs_alert(bp->b_target->bt_mount,
-"metadata I/O error: block 0x%llx (\"%s\") error %d buf count %zd",
-		(__uint64_t)XFS_BUF_ADDR(bp), func,
-		bp->b_error, XFS_BUF_COUNT(bp));
+"metadata I/O error: block 0x%llx (\"%s\") error %d numblks %d",
+		(__uint64_t)XFS_BUF_ADDR(bp), func, bp->b_error, bp->b_length);
 }
 
 int
@@ -1186,7 +1186,7 @@ _xfs_buf_ioapply(
 	int			rw, map_i, total_nr_pages, nr_pages;
 	struct bio		*bio;
 	int			offset = bp->b_offset;
-	int			size = bp->b_count_desired;
+	int			size = BBTOB(bp->b_io_length);
 	sector_t		sector = bp->b_bn;
 
 	total_nr_pages = bp->b_page_count;
@@ -1234,7 +1234,7 @@ _xfs_buf_ioapply(
 			break;
 
 		offset = 0;
-		sector += nbytes >> BBSHIFT;
+		sector += BTOBB(nbytes);
 		size -= nbytes;
 		total_nr_pages--;
 	}
@@ -1328,7 +1328,7 @@ xfs_buf_iomove(
 		page = bp->b_pages[xfs_buf_btoct(boff + bp->b_offset)];
 		cpoff = xfs_buf_poff(boff + bp->b_offset);
 		csize = min_t(size_t,
-			      PAGE_SIZE-cpoff, bp->b_count_desired-boff);
+			      PAGE_SIZE - cpoff, BBTOB(bp->b_io_length) - boff);
 
 		ASSERT(((csize + cpoff) <= PAGE_SIZE));
 
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 3dab208686a451d78ed35b1487f65cbe537ae4b6..9787645fa54cd6a2e6f007c1394fcd4dea166c8f 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -128,7 +128,6 @@ typedef struct xfs_buf {
 	struct list_head	b_list;
 	struct xfs_perag	*b_pag;		/* contains rbtree root */
 	xfs_buftarg_t		*b_target;	/* buffer target (device) */
-	size_t			b_count_desired;/* desired transfer size */
 	void			*b_addr;	/* virtual address of buffer */
 	struct work_struct	b_iodone_work;
 	xfs_buf_iodone_t	b_iodone;	/* I/O completion function */
@@ -137,6 +136,7 @@ typedef struct xfs_buf {
 	struct xfs_trans	*b_transp;
 	struct page		**b_pages;	/* array of page pointers */
 	struct page		*b_page_array[XB_PAGES]; /* inline pages */
+	int			b_io_length;	/* IO size in BBs */
 	atomic_t		b_pin_count;	/* pin count */
 	atomic_t		b_io_remaining;	/* #outstanding I/O requests */
 	unsigned int		b_page_count;	/* size of page array */
@@ -244,8 +244,6 @@ void xfs_buf_stale(struct xfs_buf *bp);
 
 #define XFS_BUF_ADDR(bp)		((bp)->b_bn)
 #define XFS_BUF_SET_ADDR(bp, bno)	((bp)->b_bn = (xfs_daddr_t)(bno))
-#define XFS_BUF_COUNT(bp)		((bp)->b_count_desired)
-#define XFS_BUF_SET_COUNT(bp, cnt)	((bp)->b_count_desired = (cnt))
 
 static inline void xfs_buf_set_ref(struct xfs_buf *bp, int lru_ref)
 {
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index 7f0abeaf919cc91dc1b0200276e4fd178c81c22a..a25206c84cf9a47a74b8ea4503ad3b26b71090f1 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -123,11 +123,11 @@ xfs_buf_item_log_check(
 	ASSERT(bip->bli_logged != NULL);
 
 	bp = bip->bli_buf;
-	ASSERT(XFS_BUF_COUNT(bp) > 0);
+	ASSERT(bp->b_length > 0);
 	ASSERT(bp->b_addr != NULL);
 	orig = bip->bli_orig;
 	buffer = bp->b_addr;
-	for (x = 0; x < XFS_BUF_COUNT(bp); x++) {
+	for (x = 0; x < BBTOB(bp->b_length); x++) {
 		if (orig[x] != buffer[x] && !btst(bip->bli_logged, x)) {
 			xfs_emerg(bp->b_mount,
 				"%s: bip %x buffer %x orig %x index %d",
@@ -657,7 +657,8 @@ xfs_buf_item_init(
 	 * truncate any pieces.  map_size is the size of the
 	 * bitmap needed to describe the chunks of the buffer.
 	 */
-	chunks = (int)((XFS_BUF_COUNT(bp) + (XFS_BLF_CHUNK - 1)) >> XFS_BLF_SHIFT);
+	chunks = (int)((BBTOB(bp->b_length) + (XFS_BLF_CHUNK - 1)) >>
+								XFS_BLF_SHIFT);
 	map_size = (int)((chunks + NBWORD) >> BIT_TO_WORD_SHIFT);
 
 	bip = (xfs_buf_log_item_t*)kmem_zone_zalloc(xfs_buf_item_zone,
@@ -667,7 +668,7 @@ xfs_buf_item_init(
 	xfs_buf_hold(bp);
 	bip->bli_format.blf_type = XFS_LI_BUF;
 	bip->bli_format.blf_blkno = (__int64_t)XFS_BUF_ADDR(bp);
-	bip->bli_format.blf_len = (ushort)BTOBB(XFS_BUF_COUNT(bp));
+	bip->bli_format.blf_len = (ushort)bp->b_length;
 	bip->bli_format.blf_map_size = map_size;
 
 #ifdef XFS_TRANS_DEBUG
@@ -679,9 +680,9 @@ xfs_buf_item_init(
 	 * the buffer to indicate which bytes the callers have asked
 	 * to have logged.
 	 */
-	bip->bli_orig = (char *)kmem_alloc(XFS_BUF_COUNT(bp), KM_SLEEP);
-	memcpy(bip->bli_orig, bp->b_addr, XFS_BUF_COUNT(bp));
-	bip->bli_logged = (char *)kmem_zalloc(XFS_BUF_COUNT(bp) / NBBY, KM_SLEEP);
+	bip->bli_orig = kmem_alloc(BBTOB(bp->b_length), KM_SLEEP);
+	memcpy(bip->bli_orig, bp->b_addr, BBTOB(bp->b_length));
+	bip->bli_logged = kmem_zalloc(BBTOB(bp->b_length) / NBBY, KM_SLEEP);
 #endif
 
 	/*
diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
index 7f1a6f5b05a6785895f93c5a1c08508c1a99e10f..b8adc79f0d88f6bf75751f82882095c303623cf3 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/xfs_da_btree.c
@@ -2277,20 +2277,20 @@ xfs_da_buf_make(int nbuf, xfs_buf_t **bps)
 	if (nbuf == 1) {
 		dabuf->nbuf = 1;
 		bp = bps[0];
-		dabuf->bbcount = (short)BTOBB(XFS_BUF_COUNT(bp));
+		dabuf->bbcount = bp->b_length;
 		dabuf->data = bp->b_addr;
 		dabuf->bps[0] = bp;
 	} else {
 		dabuf->nbuf = nbuf;
 		for (i = 0, dabuf->bbcount = 0; i < nbuf; i++) {
 			dabuf->bps[i] = bp = bps[i];
-			dabuf->bbcount += BTOBB(XFS_BUF_COUNT(bp));
+			dabuf->bbcount += bp->b_length;
 		}
 		dabuf->data = kmem_alloc(BBTOB(dabuf->bbcount), KM_SLEEP);
-		for (i = off = 0; i < nbuf; i++, off += XFS_BUF_COUNT(bp)) {
+		for (i = off = 0; i < nbuf; i++, off += BBTOB(bp->b_length)) {
 			bp = bps[i];
 			memcpy((char *)dabuf->data + off, bp->b_addr,
-				XFS_BUF_COUNT(bp));
+				BBTOB(bp->b_length));
 		}
 	}
 	return dabuf;
@@ -2310,10 +2310,10 @@ xfs_da_buf_clean(xfs_dabuf_t *dabuf)
 		ASSERT(dabuf->nbuf > 1);
 		dabuf->dirty = 0;
 		for (i = off = 0; i < dabuf->nbuf;
-				i++, off += XFS_BUF_COUNT(bp)) {
+				i++, off += BBTOB(bp->b_length)) {
 			bp = dabuf->bps[i];
 			memcpy(bp->b_addr, dabuf->data + off,
-						XFS_BUF_COUNT(bp));
+						BBTOB(bp->b_length));
 		}
 	}
 }
@@ -2356,10 +2356,10 @@ xfs_da_log_buf(xfs_trans_t *tp, xfs_dabuf_t *dabuf, uint first, uint last)
 	}
 	dabuf->dirty = 1;
 	ASSERT(first <= last);
-	for (i = off = 0; i < dabuf->nbuf; i++, off += XFS_BUF_COUNT(bp)) {
+	for (i = off = 0; i < dabuf->nbuf; i++, off += BBTOB(bp->b_length)) {
 		bp = dabuf->bps[i];
 		f = off;
-		l = f + XFS_BUF_COUNT(bp) - 1;
+		l = f + BBTOB(bp->b_length) - 1;
 		if (f < first)
 			f = first;
 		if (l > last)
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index f9d8355ffae2f0e0af8cb206d7ca9d1e5e6fdfe5..5e2aa526e0587ae133b9f65b173db645ac388900 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1487,7 +1487,7 @@ xlog_sync(xlog_t		*log,
 	} else {
 		iclog->ic_bwritecnt = 1;
 	}
-	XFS_BUF_SET_COUNT(bp, count);
+	bp->b_io_length = BTOBB(count);
 	bp->b_fspriv = iclog;
 	XFS_BUF_ZEROFLAGS(bp);
 	XFS_BUF_ASYNC(bp);
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 24f59a25ecddf1b525739fee10fcd27dc8dbdba0..8c826b00aac18b74078137bcec99b57c3fabf8f7 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -178,7 +178,7 @@ xlog_bread_noalign(
 
 	XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no);
 	XFS_BUF_READ(bp);
-	XFS_BUF_SET_COUNT(bp, BBTOB(nbblks));
+	bp->b_io_length = nbblks;
 	bp->b_error = 0;
 
 	xfsbdstrat(log->l_mp, bp);
@@ -266,7 +266,7 @@ xlog_bwrite(
 	XFS_BUF_ZEROFLAGS(bp);
 	xfs_buf_hold(bp);
 	xfs_buf_lock(bp);
-	XFS_BUF_SET_COUNT(bp, BBTOB(nbblks));
+	bp->b_io_length = nbblks;
 	bp->b_error = 0;
 
 	error = xfs_bwrite(bp);
@@ -1778,7 +1778,7 @@ xlog_recover_do_inode_buffer(
 
 	trace_xfs_log_recover_buf_inode_buf(mp->m_log, buf_f);
 
-	inodes_per_buf = XFS_BUF_COUNT(bp) >> mp->m_sb.sb_inodelog;
+	inodes_per_buf = BBTOB(bp->b_io_length) >> mp->m_sb.sb_inodelog;
 	for (i = 0; i < inodes_per_buf; i++) {
 		next_unlinked_offset = (i * mp->m_sb.sb_inodesize) +
 			offsetof(xfs_dinode_t, di_next_unlinked);
@@ -1820,7 +1820,8 @@ xlog_recover_do_inode_buffer(
 
 		ASSERT(item->ri_buf[item_index].i_addr != NULL);
 		ASSERT((item->ri_buf[item_index].i_len % XFS_BLF_CHUNK) == 0);
-		ASSERT((reg_buf_offset + reg_buf_bytes) <= XFS_BUF_COUNT(bp));
+		ASSERT((reg_buf_offset + reg_buf_bytes) <=
+							BBTOB(bp->b_io_length));
 
 		/*
 		 * The current logged region contains a copy of the
@@ -1879,8 +1880,8 @@ xlog_recover_do_reg_buffer(
 		ASSERT(nbits > 0);
 		ASSERT(item->ri_buf[i].i_addr != NULL);
 		ASSERT(item->ri_buf[i].i_len % XFS_BLF_CHUNK == 0);
-		ASSERT(XFS_BUF_COUNT(bp) >=
-		       ((uint)bit << XFS_BLF_SHIFT)+(nbits<<XFS_BLF_SHIFT));
+		ASSERT(BBTOB(bp->b_io_length) >=
+		       ((uint)bit << XFS_BLF_SHIFT) + (nbits << XFS_BLF_SHIFT));
 
 		/*
 		 * Do a sanity check if this is a dquot buffer. Just checking
@@ -2173,7 +2174,7 @@ xlog_recover_buffer_pass2(
 	 */
 	if (XFS_DINODE_MAGIC ==
 	    be16_to_cpu(*((__be16 *)xfs_buf_offset(bp, 0))) &&
-	    (XFS_BUF_COUNT(bp) != MAX(log->l_mp->m_sb.sb_blocksize,
+	    (BBTOB(bp->b_io_length) != MAX(log->l_mp->m_sb.sb_blocksize,
 			(__uint32_t)XFS_INODE_CLUSTER_SIZE(log->l_mp)))) {
 		xfs_buf_stale(bp);
 		error = xfs_bwrite(bp);
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 9132d162c4b83daf461d31ac94a6ae6362a2bfc1..2ec196b6c07964890000316b4449ec4c9a58d53a 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -56,7 +56,7 @@ xfs_trans_buf_item_match(
 		if (blip->bli_item.li_type == XFS_LI_BUF &&
 		    blip->bli_buf->b_target == target &&
 		    XFS_BUF_ADDR(blip->bli_buf) == blkno &&
-		    XFS_BUF_COUNT(blip->bli_buf) == len)
+		    BBTOB(blip->bli_buf->b_length) == len)
 			return blip->bli_buf;
 	}
 
@@ -585,7 +585,7 @@ xfs_trans_log_buf(xfs_trans_t	*tp,
 
 	ASSERT(bp->b_transp == tp);
 	ASSERT(bip != NULL);
-	ASSERT((first <= last) && (last < XFS_BUF_COUNT(bp)));
+	ASSERT(first <= last && last < BBTOB(bp->b_length));
 	ASSERT(bp->b_iodone == NULL ||
 	       bp->b_iodone == xfs_buf_iodone_callbacks);