swapfile.c (39fe5434cb9de5da40510028b17b96bc4eb312b3) swapfile.c (b0cb1a19d05b8ea8611a9ef48a17fe417f1832e6)
1/*
2 * linux/mm/swapfile.c
3 *
4 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
5 * Swap reorganised 29.12.95, Stephen Tweedie
6 */
7
8#include <linux/mm.h>

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420 delete_from_swap_cache(page);
421 SetPageDirty(page);
422 }
423 unlock_page(page);
424 page_cache_release(page);
425 }
426}
427
1/*
2 * linux/mm/swapfile.c
3 *
4 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
5 * Swap reorganised 29.12.95, Stephen Tweedie
6 */
7
8#include <linux/mm.h>

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420 delete_from_swap_cache(page);
421 SetPageDirty(page);
422 }
423 unlock_page(page);
424 page_cache_release(page);
425 }
426}
427
428#ifdef CONFIG_SOFTWARE_SUSPEND
428#ifdef CONFIG_HIBERNATION
429/*
430 * Find the swap type that corresponds to given device (if any).
431 *
432 * @offset - number of the PAGE_SIZE-sized block of the device, starting
433 * from 0, in which the swap header is expected to be located.
434 *
435 * This is needed for the suspend to disk (aka swsusp).
436 */

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946 if (lh == &sis->extent_list)
947 lh = lh->next;
948 se = list_entry(lh, struct swap_extent, list);
949 sis->curr_swap_extent = se;
950 BUG_ON(se == start_se); /* It *must* be present */
951 }
952}
953
429/*
430 * Find the swap type that corresponds to given device (if any).
431 *
432 * @offset - number of the PAGE_SIZE-sized block of the device, starting
433 * from 0, in which the swap header is expected to be located.
434 *
435 * This is needed for the suspend to disk (aka swsusp).
436 */

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946 if (lh == &sis->extent_list)
947 lh = lh->next;
948 se = list_entry(lh, struct swap_extent, list);
949 sis->curr_swap_extent = se;
950 BUG_ON(se == start_se); /* It *must* be present */
951 }
952}
953
954#ifdef CONFIG_SOFTWARE_SUSPEND
954#ifdef CONFIG_HIBERNATION
955/*
956 * Get the (PAGE_SIZE) block corresponding to given offset on the swapdev
957 * corresponding to given index in swap_info (swap type).
958 */
959sector_t swapdev_block(int swap_type, pgoff_t offset)
960{
961 struct swap_info_struct *sis;
962
963 if (swap_type >= nr_swapfiles)
964 return 0;
965
966 sis = swap_info + swap_type;
967 return (sis->flags & SWP_WRITEOK) ? map_swap_page(sis, offset) : 0;
968}
955/*
956 * Get the (PAGE_SIZE) block corresponding to given offset on the swapdev
957 * corresponding to given index in swap_info (swap type).
958 */
959sector_t swapdev_block(int swap_type, pgoff_t offset)
960{
961 struct swap_info_struct *sis;
962
963 if (swap_type >= nr_swapfiles)
964 return 0;
965
966 sis = swap_info + swap_type;
967 return (sis->flags & SWP_WRITEOK) ? map_swap_page(sis, offset) : 0;
968}
969#endif /* CONFIG_SOFTWARE_SUSPEND */
969#endif /* CONFIG_HIBERNATION */
970
971/*
972 * Free all of a swapdev's extent information
973 */
974static void destroy_swap_extents(struct swap_info_struct *sis)
975{
976 while (!list_empty(&sis->extent_list)) {
977 struct swap_extent *se;

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971/*
972 * Free all of a swapdev's extent information
973 */
974static void destroy_swap_extents(struct swap_info_struct *sis)
975{
976 while (!list_empty(&sis->extent_list)) {
977 struct swap_extent *se;

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