linux-master/mm/filemap.c

1106 		if (test_bit(key->bit_nr, &key->folio->flags))
1109 			if (test_and_set_bit(key->bit_nr, &key->folio->flags))
1141 static void folio_wake_bit(struct folio *folio, int bit_nr)
1148 	key.bit_nr = bit_nr;
1188 static inline bool folio_trylock_flag(struct folio *folio, int bit_nr,
1192 		if (test_and_set_bit(bit_nr, &folio->flags))
1194 	} else if (test_bit(bit_nr, &folio->flags))
1204 static inline int folio_wait_bit_common(struct folio *folio, int bit_nr,
1215 	if (bit_nr == PG_locked &&
1225 	wait_page.bit_nr = bit_nr;
1251 	if (!folio_trylock_flag(folio, bit_nr, wait))
1301 		if (unlikely(test_and_set_bit(bit_nr, folio_flags(folio, 0))))
1378 	wait_page.bit_nr = PG_locked;
1420 void folio_wait_bit(struct folio *folio, int bit_nr)
1422 	folio_wait_bit_common(folio, bit_nr, TASK_UNINTERRUPTIBLE, SHARED);
1426 int folio_wait_bit_killable(struct folio *folio, int bit_nr)
1428 	return folio_wait_bit_common(folio, bit_nr, TASK_KILLABLE, SHARED);
1639 	wait->bit_nr = PG_locked;