diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index b770c095e45c62f86e78da2f9d1524085f9d45fd..3a8bdd7f5756e37d430f15b2b5b76fb672c9b965 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -557,9 +557,9 @@ static u64 swap_pte_to_pagemap_entry(pte_t pte)
 	return swp_type(e) | (swp_offset(e) << MAX_SWAPFILES_SHIFT);
 }
 
-static unsigned long pte_to_pagemap_entry(pte_t pte)
+static u64 pte_to_pagemap_entry(pte_t pte)
 {
-	unsigned long pme = 0;
+	u64 pme = 0;
 	if (is_swap_pte(pte))
 		pme = PM_PFRAME(swap_pte_to_pagemap_entry(pte))
 			| PM_PSHIFT(PAGE_SHIFT) | PM_SWAP;