XFS_EXCHMAPS_LOGGED_FLAGS
BUILD_BUG_ON(XFS_EXCHMAPS_INTERNAL_FLAGS & XFS_EXCHMAPS_LOGGED_FLAGS);
ASSERT(!(req->flags & ~XFS_EXCHMAPS_LOGGED_FLAGS));
xlf->xmi_flags = xmi->xmi_flags & XFS_EXCHMAPS_LOGGED_FLAGS;
if (xlf->xmi_flags & ~XFS_EXCHMAPS_LOGGED_FLAGS)