diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index 0287f3b1b503c65488c877421289e54d714e7626..43f791bcd8b1b7dbf4053cdedf2856ee41d1eed0 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -2447,7 +2447,7 @@ xfs_alloc_vextent(
 {
 	DECLARE_COMPLETION_ONSTACK(done);
 
-	if (!args->userdata)
+	if (!args->stack_switch)
 		return __xfs_alloc_vextent(args);
 
 
diff --git a/fs/xfs/xfs_alloc.h b/fs/xfs/xfs_alloc.h
index 93be4a667ca1692648aec03195b5747bac4239f2..ef7d4885dc2d448ea9f4313b11324dad04ad0a76 100644
--- a/fs/xfs/xfs_alloc.h
+++ b/fs/xfs/xfs_alloc.h
@@ -123,6 +123,7 @@ typedef struct xfs_alloc_arg {
 	struct completion *done;
 	struct work_struct work;
 	int		result;
+	char		stack_switch;
 } xfs_alloc_arg_t;
 
 /*
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index e1545ec2f7d2b118713460d2c722e80d7fc3571c..91259554df8b50053c9c141f290aac665811991c 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -2441,6 +2441,7 @@ xfs_bmap_btalloc(
 	args.tp = ap->tp;
 	args.mp = mp;
 	args.fsbno = ap->blkno;
+	args.stack_switch = ap->stack_switch;
 
 	/* Trim the allocation back to the maximum an AG can fit. */
 	args.maxlen = MIN(ap->length, XFS_ALLOC_AG_MAX_USABLE(mp));
@@ -4675,6 +4676,9 @@ xfs_bmapi_allocate(
 			return error;
 	}
 
+	if (flags & XFS_BMAPI_STACK_SWITCH)
+		bma->stack_switch = 1;
+
 	error = xfs_bmap_alloc(bma);
 	if (error)
 		return error;
diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
index 803b56d7ce16a97b7e5eb8075ba4e7853e4b8d30..b68c598034c1513d02f4e2ad03c81e4850185460 100644
--- a/fs/xfs/xfs_bmap.h
+++ b/fs/xfs/xfs_bmap.h
@@ -77,6 +77,7 @@ typedef	struct xfs_bmap_free
  * from written to unwritten, otherwise convert from unwritten to written.
  */
 #define XFS_BMAPI_CONVERT	0x040
+#define XFS_BMAPI_STACK_SWITCH	0x080
 
 #define XFS_BMAPI_FLAGS \
 	{ XFS_BMAPI_ENTIRE,	"ENTIRE" }, \
@@ -85,7 +86,8 @@ typedef	struct xfs_bmap_free
 	{ XFS_BMAPI_PREALLOC,	"PREALLOC" }, \
 	{ XFS_BMAPI_IGSTATE,	"IGSTATE" }, \
 	{ XFS_BMAPI_CONTIG,	"CONTIG" }, \
-	{ XFS_BMAPI_CONVERT,	"CONVERT" }
+	{ XFS_BMAPI_CONVERT,	"CONVERT" }, \
+	{ XFS_BMAPI_STACK_SWITCH, "STACK_SWITCH" }
 
 
 static inline int xfs_bmapi_aflag(int w)
@@ -133,6 +135,7 @@ typedef struct xfs_bmalloca {
 	char			userdata;/* set if is user data */
 	char			aeof;	/* allocated space at eof */
 	char			conv;	/* overwriting unwritten extents */
+	char			stack_switch;
 } xfs_bmalloca_t;
 
 /*
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index f858b903678e067ec009b406f47df09ca2899cdf..a066cf1766ab6a3963759b4e7e3268bc2a81f47b 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -575,7 +575,9 @@ xfs_iomap_write_allocate(
 			 * pointer that the caller gave to us.
 			 */
 			error = xfs_bmapi_write(tp, ip, map_start_fsb,
-						count_fsb, 0, &first_block, 1,
+						count_fsb,
+						XFS_BMAPI_STACK_SWITCH,
+						&first_block, 1,
 						imap, &nimaps, &free_list);
 			if (error)
 				goto trans_cancel;