xas_get_mark
if (!xas_get_mark(xas, PAGECACHE_TAG_TOWRITE))
(xas_get_mark(&xas, PAGECACHE_TAG_DIRTY) ||
xas_get_mark(&xas, PAGECACHE_TAG_TOWRITE)))
bool xas_get_mark(const struct xa_state *, xa_mark_t);
XA_BUG_ON(xa, !xas_get_mark(&xas, XA_MARK_0));
while (xas_get_mark(&xas, mark)) {
EXPORT_SYMBOL_GPL(xas_get_mark);
if (xas_get_mark(&xas, PAGECACHE_TAG_DIRTY))
if (xas_get_mark(&xas, PAGECACHE_TAG_WRITEBACK))