5 files changed, 13 insertions, 3 deletions

diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index 0287f3b1b503..43f791bcd8b1 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 93be4a667ca1..ef7d4885dc2d 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 e1545ec2f7d2..91259554df8b 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 803b56d7ce16..b68c598034c1 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 973dff6ad935..7f537663365b 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -584,7 +584,9 @@ 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;