diff options
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 2bfacbac0f4c..55242363de64 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -945,6 +945,23 @@ sector_t map_swap_page(struct swap_info_struct *sis, pgoff_t offset) } } +#ifdef CONFIG_SOFTWARE_SUSPEND +/* + * Get the (PAGE_SIZE) block corresponding to given offset on the swapdev + * corresponding to given index in swap_info (swap type). + */ +sector_t swapdev_block(int swap_type, pgoff_t offset) +{ + struct swap_info_struct *sis; + + if (swap_type >= nr_swapfiles) + return 0; + + sis = swap_info + swap_type; + return (sis->flags & SWP_WRITEOK) ? map_swap_page(sis, offset) : 0; +} +#endif /* CONFIG_SOFTWARE_SUSPEND */ + /* * Free all of a swapdev's extent information */ |