swapfile.c (c3cc99ff5d24e2eeaf7ec2032e720681916990e3) swapfile.c (19fd6231279be3c3bdd02ed99f9b0eb195978064)
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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364 p = swap_info_get(entry);
365 if (!p)
366 return 0;
367
368 /* Is the only swap cache user the cache itself? */
369 retval = 0;
370 if (p->swap_map[swp_offset(entry)] == 1) {
371 /* Recheck the page count with the swapcache lock held.. */
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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364 p = swap_info_get(entry);
365 if (!p)
366 return 0;
367
368 /* Is the only swap cache user the cache itself? */
369 retval = 0;
370 if (p->swap_map[swp_offset(entry)] == 1) {
371 /* Recheck the page count with the swapcache lock held.. */
372 write_lock_irq(&swapper_space.tree_lock);
372 spin_lock_irq(&swapper_space.tree_lock);
373 if ((page_count(page) == 2) && !PageWriteback(page)) {
374 __delete_from_swap_cache(page);
375 SetPageDirty(page);
376 retval = 1;
377 }
373 if ((page_count(page) == 2) && !PageWriteback(page)) {
374 __delete_from_swap_cache(page);
375 SetPageDirty(page);
376 retval = 1;
377 }
378 write_unlock_irq(&swapper_space.tree_lock);
378 spin_unlock_irq(&swapper_space.tree_lock);
379 }
380 spin_unlock(&swap_lock);
381
382 if (retval) {
383 swap_free(entry);
384 page_cache_release(page);
385 }
386

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380 spin_unlock(&swap_lock);
381
382 if (retval) {
383 swap_free(entry);
384 page_cache_release(page);
385 }
386

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