unsigned long alloc_swap_page(int swap, struct bitmap_page *bitmap) { unsigned long offset; offset = swp_offset(get_swap_page_of_type(swap)); if (offset) { if (bitmap_set(bitmap, offset)) { swap_free(swp_entry(swap, offset)); offset = 0; } } return offset; }
sector_t alloc_swapdev_block(int swap, struct bitmap_page *bitmap) { unsigned long offset; offset = swp_offset(get_swap_page_of_type(swap)); if (offset) { if (bitmap_set(bitmap, offset)) swap_free(swp_entry(swap, offset)); else return swapdev_block(swap, offset); } return 0; }