diff options
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 8b5bd34b1a00..30a90fd140b7 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -34,6 +34,7 @@ #include <linux/frontswap.h> #include <linux/swapfile.h> #include <linux/export.h> +#include <linux/swap_slots.h> #include <asm/pgtable.h> #include <asm/tlbflush.h> @@ -854,14 +855,6 @@ noswap: return n_ret; } -swp_entry_t get_swap_page(void) -{ - swp_entry_t entry; - - get_swap_pages(1, &entry); - return entry; -} - /* The only caller of this function is now suspend routine */ swp_entry_t get_swap_page_of_type(int type) { @@ -1052,7 +1045,7 @@ void swap_free(swp_entry_t entry) p = _swap_info_get(entry); if (p) { if (!__swap_entry_free(p, entry, 1)) - swapcache_free_entries(&entry, 1); + free_swap_slot(entry); } } @@ -1066,7 +1059,7 @@ void swapcache_free(swp_entry_t entry) p = _swap_info_get(entry); if (p) { if (!__swap_entry_free(p, entry, SWAP_HAS_CACHE)) - swapcache_free_entries(&entry, 1); + free_swap_slot(entry); } } @@ -1288,7 +1281,7 @@ int free_swap_and_cache(swp_entry_t entry) page = NULL; } } else if (!count) - swapcache_free_entries(&entry, 1); + free_swap_slot(entry); } if (page) { /* @@ -2116,6 +2109,17 @@ static void reinsert_swap_info(struct swap_info_struct *p) spin_unlock(&swap_lock); } +bool has_usable_swap(void) +{ + bool ret = true; + + spin_lock(&swap_lock); + if (plist_head_empty(&swap_active_head)) + ret = false; + spin_unlock(&swap_lock); + return ret; +} + SYSCALL_DEFINE1(swapoff, const char __user *, specialfile) { struct swap_info_struct *p = NULL; |