xfs: add asserts for the mmap lock in xfs_{insert,collapse}_file_space

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/xfs_bmap_util.c

@@ -1334,6 +1334,8 @@ xfs_collapse_file_space(
 	bool			done = false;
 
 	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
+	ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
+
 	trace_xfs_collapse_file_space(ip);
 
 	error = xfs_free_file_space(ip, offset, len);
@@ -1408,6 +1410,8 @@ xfs_insert_file_space(
 	bool			done = false;
 
 	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
+	ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
+
 	trace_xfs_insert_file_space(ip);
 
 	error = xfs_prepare_shift(ip, offset);