774 	unsigned char count;  in swap_entry_free()  local
777 	count = p->swap_map[offset];  in swap_entry_free()
778 	has_cache = count & SWAP_HAS_CACHE;  in swap_entry_free()
779 	count &= ~SWAP_HAS_CACHE;  in swap_entry_free()
784 	} else if (count == SWAP_MAP_SHMEM) {  in swap_entry_free()
789 		count = 0;  in swap_entry_free()
790 	} else if ((count & ~COUNT_CONTINUED) <= SWAP_MAP_MAX) {  in swap_entry_free()
791 		if (count == COUNT_CONTINUED) {  in swap_entry_free()
792 			if (swap_count_continued(p, offset, count))  in swap_entry_free()
793 				count = SWAP_MAP_MAX | COUNT_CONTINUED;  in swap_entry_free()
795 				count = SWAP_MAP_MAX;  in swap_entry_free()
797 			count--;  in swap_entry_free()
800 	usage = count | has_cache;  in swap_entry_free()
871 	int count = 0;  in page_swapcount()  local
878 		count = swap_count(p->swap_map[swp_offset(entry)]);  in page_swapcount()
881 	return count;  in page_swapcount()
890 	int count, tmp_count, n;  in swp_swapcount()  local
900 	count = swap_count(p->swap_map[swp_offset(entry)]);  in swp_swapcount()
901 	if (!(count & COUNT_CONTINUED))  in swp_swapcount()
904 	count &= ~COUNT_CONTINUED;  in swp_swapcount()
918 		count += (tmp_count & ~COUNT_CONTINUED) * n;  in swp_swapcount()
923 	return count;  in swp_swapcount()
938 	int count;  in reuse_swap_page()  local
943 	count = page_trans_huge_mapcount(page, total_mapcount);  in reuse_swap_page()
944 	if (count <= 1 && PageSwapCache(page)) {  in reuse_swap_page()
945 		count += page_swapcount(page);  in reuse_swap_page()
946 		if (count != 1)  in reuse_swap_page()
965 	return count <= 1;  in reuse_swap_page()
1345 	unsigned char count;  in find_next_to_unuse()  local
1373 		count = READ_ONCE(si->swap_map[i]);  in find_next_to_unuse()
1374 		if (count && swap_count(count) != SWAP_MAP_BAD)  in find_next_to_unuse()
2632 	unsigned char count;  in __swap_duplicate()  local
2649 	count = p->swap_map[offset];  in __swap_duplicate()
2655 	if (unlikely(swap_count(count) == SWAP_MAP_BAD)) {  in __swap_duplicate()
2660 	has_cache = count & SWAP_HAS_CACHE;  in __swap_duplicate()
2661 	count &= ~SWAP_HAS_CACHE;  in __swap_duplicate()
2667 		if (!has_cache && count)  in __swap_duplicate()
2674 	} else if (count || has_cache) {  in __swap_duplicate()
2676 		if ((count & ~COUNT_CONTINUED) < SWAP_MAP_MAX)  in __swap_duplicate()
2677 			count += usage;  in __swap_duplicate()
2678 		else if ((count & ~COUNT_CONTINUED) > SWAP_MAP_MAX)  in __swap_duplicate()
2680 		else if (swap_count_continued(p, offset, count))  in __swap_duplicate()
2681 			count = COUNT_CONTINUED;  in __swap_duplicate()
2687 	p->swap_map[offset] = count | has_cache;  in __swap_duplicate()
2783 	unsigned char count;  in add_swap_count_continuation()  local
2802 	count = si->swap_map[offset] & ~SWAP_HAS_CACHE;  in add_swap_count_continuation()
2804 	if ((count & ~COUNT_CONTINUED) != SWAP_MAP_MAX) {  in add_swap_count_continuation()
2831 		BUG_ON(count & COUNT_CONTINUED);  in add_swap_count_continuation()
2844 		if (!(count & COUNT_CONTINUED))  in add_swap_count_continuation()
2848 		count = *map;  in add_swap_count_continuation()
2855 		if ((count & ~COUNT_CONTINUED) != SWAP_CONT_MAX)  in add_swap_count_continuation()
2878 				 pgoff_t offset, unsigned char count)  in swap_count_continued()  argument
2886 		BUG_ON(count & COUNT_CONTINUED);  in swap_count_continued()
2894 	if (count == SWAP_MAP_MAX)	/* initial increment from swap_map */  in swap_count_continued()
2897 	if (count == (SWAP_MAP_MAX | COUNT_CONTINUED)) { /* incrementing */  in swap_count_continued()
2930 		BUG_ON(count != COUNT_CONTINUED);  in swap_count_continued()
2940 			count = 0;  in swap_count_continued()
2945 			*map = SWAP_CONT_MAX | count;  in swap_count_continued()
2946 			count = COUNT_CONTINUED;  in swap_count_continued()
2950 		return count == COUNT_CONTINUED;  in swap_count_continued()