diff options
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index b7446b3b5..c574fb59a 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -5,25 +5,16 @@ * Swap reorganised 29.12.95, Stephen Tweedie */ -#include <linux/mm.h> -#include <linux/smp.h> +#include <linux/malloc.h> #include <linux/smp_lock.h> -#include <linux/sched.h> -#include <linux/kernel.h> #include <linux/kernel_stat.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/stat.h> #include <linux/swap.h> -#include <linux/fs.h> #include <linux/swapctl.h> -#include <linux/malloc.h> #include <linux/blkdev.h> /* for blk_size */ #include <linux/vmalloc.h> #include <linux/pagemap.h> #include <linux/shm.h> -#include <asm/bitops.h> #include <asm/pgtable.h> unsigned int nr_swapfiles = 0; @@ -317,14 +308,14 @@ static int try_to_unuse(unsigned int type) /* Get a page for the entry, using the existing swap cache page if there is one. Otherwise, get a clean page and read the swap into it. */ - page_map = read_swap_cache(entry, 0); + page_map = read_swap_cache(entry); if (!page_map) { /* * Continue searching if the entry became unused. */ if (si->swap_map[i] == 0) continue; - return -ENOMEM; + return -ENOMEM; } page = page_address(page_map); read_lock(&tasklist_lock); @@ -559,8 +550,17 @@ asmlinkage int sys_swapon(const char * specialfile, int swap_flags) if (p->swap_device == swap_info[i].swap_device) goto bad_swap; } - } else if (!S_ISREG(swap_dentry->d_inode->i_mode)) + } else if (S_ISREG(swap_dentry->d_inode->i_mode)) { + error = -EBUSY; + for (i = 0 ; i < nr_swapfiles ; i++) { + if (i == type) + continue; + if (p->swap_file == swap_info[i].swap_file) + goto bad_swap; + } + } else goto bad_swap; + swap_header = (void *) __get_free_page(GFP_USER); if (!swap_header) { printk("Unable to start swapping: out of memory :-)\n"); @@ -627,7 +627,7 @@ asmlinkage int sys_swapon(const char * specialfile, int swap_flags) p->max = swap_header->info.last_page; if (p->max >= 0x7fffffffL/PAGE_SIZE || - (void *) &swap_header->info.badpages[swap_header->info.nr_badpages-1] >= (void *) swap_header->magic.magic) { + (void *) &swap_header->info.badpages[(int) swap_header->info.nr_badpages-1] >= (void *) swap_header->magic.magic) { error = -EINVAL; goto bad_swap; } |