1 files changed, 4 insertions, 1 deletions

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index ac4feae45eb3..4ee44ddfdfb7 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -631,7 +631,7 @@ xfs_ioc_space(
 
         if (filp->f_flags & O_DSYNC)
                 flags |= XFS_PREALLOC_SYNC;
-        if (ioflags & XFS_IO_INVIS)     
+        if (ioflags & XFS_IO_INVIS)
                 flags |= XFS_PREALLOC_INVISIBLE;
 
         error = mnt_want_write_file(filp);
@@ -643,6 +643,9 @@ xfs_ioc_space(
         if (error)
                 goto out_unlock;
 
+        xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
+        iolock |= XFS_MMAPLOCK_EXCL;
+
         switch (bf->l_whence) {
         case 0: /*SEEK_SET*/
                 break;