swapfile.c (f9f956b550b8ce6fb902af9f29ba31b3e0fd052d) swapfile.c (3ecdeb0f876e91c4a7129ba2ba5baa530aa6c4f9)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/mm/swapfile.c
4 *
5 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
6 * Swap reorganised 29.12.95, Stephen Tweedie
7 */
8

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1439 return swap_count(si->swap_map[offset]);
1440}
1441
1442/*
1443 * How many references to @entry are currently swapped out?
1444 * This does not give an exact answer when swap count is continued,
1445 * but does include the high COUNT_CONTINUED flag to allow for that.
1446 */
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/mm/swapfile.c
4 *
5 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
6 * Swap reorganised 29.12.95, Stephen Tweedie
7 */
8

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1439 return swap_count(si->swap_map[offset]);
1440}
1441
1442/*
1443 * How many references to @entry are currently swapped out?
1444 * This does not give an exact answer when swap count is continued,
1445 * but does include the high COUNT_CONTINUED flag to allow for that.
1446 */
1447static int swap_swapcount(struct swap_info_struct *si, swp_entry_t entry)
1447int swap_swapcount(struct swap_info_struct *si, swp_entry_t entry)
1448{
1449 pgoff_t offset = swp_offset(entry);
1450 struct swap_cluster_info *ci;
1451 int count;
1452
1453 ci = lock_cluster_or_swap_info(si, offset);
1454 count = swap_count(si->swap_map[offset]);
1455 unlock_cluster_or_swap_info(si, ci);
1456 return count;
1457}
1458
1459/*
1460 * How many references to @entry are currently swapped out?
1448{
1449 pgoff_t offset = swp_offset(entry);
1450 struct swap_cluster_info *ci;
1451 int count;
1452
1453 ci = lock_cluster_or_swap_info(si, offset);
1454 count = swap_count(si->swap_map[offset]);
1455 unlock_cluster_or_swap_info(si, ci);
1456 return count;
1457}
1458
1459/*
1460 * How many references to @entry are currently swapped out?
1461 * This does not give an exact answer when swap count is continued,
1462 * but does include the high COUNT_CONTINUED flag to allow for that.
1463 */
1464int __swp_swapcount(swp_entry_t entry)
1465{
1466 int count = 0;
1467 struct swap_info_struct *si;
1468
1469 si = get_swap_device(entry);
1470 if (si) {
1471 count = swap_swapcount(si, entry);
1472 put_swap_device(si);
1473 }
1474 return count;
1475}
1476
1477/*
1478 * How many references to @entry are currently swapped out?
1479 * This considers COUNT_CONTINUED so it returns exact answer.
1480 */
1481int swp_swapcount(swp_entry_t entry)
1482{
1483 int count, tmp_count, n;
1484 struct swap_info_struct *p;
1485 struct swap_cluster_info *ci;
1486 struct page *page;

--- 2201 unchanged lines hidden --- 		1461 * This considers COUNT_CONTINUED so it returns exact answer.
1462 */
1463int swp_swapcount(swp_entry_t entry)
1464{
1465 int count, tmp_count, n;
1466 struct swap_info_struct *p;
1467 struct swap_cluster_info *ci;
1468 struct page *page;

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