diff options
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 66 |
1 files changed, 3 insertions, 63 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 43d5a5e7d..41e4581af 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -9,7 +9,6 @@ #include <linux/hugetlb.h> #include <linux/mman.h> #include <linux/slab.h> -#include <linux/export.h> #include <linux/kernel_stat.h> #include <linux/swap.h> #include <linux/vmalloc.h> @@ -44,6 +43,7 @@ static bool swap_count_continued(struct swap_info_struct *, pgoff_t, unsigned char); static void free_swap_count_continuations(struct swap_info_struct *); +static sector_t map_swap_entry(swp_entry_t, struct block_device**); DEFINE_SPINLOCK(swap_lock); static unsigned int nr_swapfiles; @@ -722,60 +722,6 @@ swp_entry_t get_swap_page_of_type(int type) return (swp_entry_t) {0}; } -static unsigned int find_next_to_unuse(struct swap_info_struct *si, - unsigned int prev, bool frontswap); - -void get_swap_range_of_type(int type, swp_entry_t *start, swp_entry_t *end, - unsigned int limit) -{ - struct swap_info_struct *si; - pgoff_t start_at; - unsigned int i; - - *start = swp_entry(0, 0); - *end = swp_entry(0, 0); - si = swap_info[type]; - spin_lock(&si->lock); - if (si && (si->flags & SWP_WRITEOK)) { - atomic_long_dec(&nr_swap_pages); - /* This is called for allocating swap entry, not cache */ - start_at = scan_swap_map(si, 1); - if (start_at) { - unsigned long stop_at = find_next_to_unuse(si, start_at, 0); - if (stop_at > start_at) - stop_at--; - else - stop_at = si->max - 1; - if (stop_at - start_at + 1 > limit) - stop_at = min_t(unsigned int, - start_at + limit - 1, - si->max - 1); - /* Mark them used */ - for (i = start_at; i <= stop_at; i++) - si->swap_map[i] = 1; - /* first page already done above */ - si->inuse_pages += stop_at - start_at; - - atomic_long_sub(stop_at - start_at, &nr_swap_pages); - if (start_at == si->lowest_bit) - si->lowest_bit = stop_at + 1; - if (stop_at == si->highest_bit) - si->highest_bit = start_at - 1; - if (si->inuse_pages == si->pages) { - si->lowest_bit = si->max; - si->highest_bit = 0; - } - for (i = start_at + 1; i <= stop_at; i++) - inc_cluster_info_page(si, si->cluster_info, i); - si->cluster_next = stop_at + 1; - *start = swp_entry(type, start_at); - *end = swp_entry(type, stop_at); - } else - atomic_long_inc(&nr_swap_pages); - } - spin_unlock(&si->lock); -} - static struct swap_info_struct *swap_info_get(swp_entry_t entry) { struct swap_info_struct *p; @@ -1630,7 +1576,7 @@ static void drain_mmlist(void) * Note that the type of this function is sector_t, but it returns page offset * into the bdev, not sector offset. */ -sector_t map_swap_entry(swp_entry_t entry, struct block_device **bdev) +static sector_t map_swap_entry(swp_entry_t entry, struct block_device **bdev) { struct swap_info_struct *sis; struct swap_extent *start_se; @@ -2086,7 +2032,7 @@ static int swap_show(struct seq_file *swap, void *v) } file = si->swap_file; - len = seq_path(swap, &file->f_path, " \t\n\\"); + len = seq_file_path(swap, file, " \t\n\\"); seq_printf(swap, "%*s%s\t%u\t%u\t%d\n", len < 40 ? 40 - len : 1, " ", S_ISBLK(file_inode(file)->i_mode) ? @@ -2775,14 +2721,8 @@ pgoff_t __page_file_index(struct page *page) VM_BUG_ON_PAGE(!PageSwapCache(page), page); return swp_offset(swap); } - EXPORT_SYMBOL_GPL(__page_file_index); -struct swap_info_struct *get_swap_info_struct(unsigned type) -{ - return swap_info[type]; -} - /* * add_swap_count_continuation - called when a swap count is duplicated * beyond SWAP_MAP_MAX, it allocates a new page and links that to the entry's |