1 files changed, 5 insertions, 26 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 15322b73636b..cd1f29e4897e 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2877,7 +2877,7 @@ static int __do_fault(struct vm_area_struct *vma, unsigned long address,
  * vm_ops->map_pages.
  */
 void do_set_pte(struct vm_area_struct *vma, unsigned long address,
-                struct page *page, pte_t *pte, bool write, bool anon, bool old)
+                struct page *page, pte_t *pte, bool write, bool anon)
 {
         pte_t entry;
 
@@ -2885,8 +2885,6 @@ void do_set_pte(struct vm_area_struct *vma, unsigned long address,
         entry = mk_pte(page, vma->vm_page_prot);
         if (write)
                 entry = maybe_mkwrite(pte_mkdirty(entry), vma);
-        if (old)
-                entry = pte_mkold(entry);
         if (anon) {
                 inc_mm_counter_fast(vma->vm_mm, MM_ANONPAGES);
                 page_add_new_anon_rmap(page, vma, address, false);
@@ -2900,16 +2898,8 @@ void do_set_pte(struct vm_area_struct *vma, unsigned long address,
         update_mmu_cache(vma, address, pte);
 }
 
-/*
- * If architecture emulates "accessed" or "young" bit without HW support,
- * there is no much gain with fault_around.
- */
 static unsigned long fault_around_bytes __read_mostly =
-#ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
-        PAGE_SIZE;
-#else
         rounddown_pow_of_two(65536);
-#endif
 
 #ifdef CONFIG_DEBUG_FS
 static int fault_around_bytes_get(void *data, u64 *val)
@@ -3032,20 +3022,9 @@ static int do_read_fault(struct mm_struct *mm, struct vm_area_struct *vma,
          */
         if (vma->vm_ops->map_pages && fault_around_bytes >> PAGE_SHIFT > 1) {
                 pte = pte_offset_map_lock(mm, pmd, address, &ptl);
-                if (!pte_same(*pte, orig_pte))
-                        goto unlock_out;
                 do_fault_around(vma, address, pte, pgoff, flags);
-                /* Check if the fault is handled by faultaround */
-                if (!pte_same(*pte, orig_pte)) {
-                        /*
-                         * Faultaround produce old pte, but the pte we've
-                         * handler fault for should be young.
-                         */
-                        pte_t entry = pte_mkyoung(*pte);
-                        if (ptep_set_access_flags(vma, address, pte, entry, 0))
-                                update_mmu_cache(vma, address, pte);
+                if (!pte_same(*pte, orig_pte))
                         goto unlock_out;
-                }
                 pte_unmap_unlock(pte, ptl);
         }
 
@@ -3060,7 +3039,7 @@ static int do_read_fault(struct mm_struct *mm, struct vm_area_struct *vma,
                 put_page(fault_page);
                 return ret;
         }
-        do_set_pte(vma, address, fault_page, pte, false, false, false);
+        do_set_pte(vma, address, fault_page, pte, false, false);
         unlock_page(fault_page);
 unlock_out:
         pte_unmap_unlock(pte, ptl);
@@ -3111,7 +3090,7 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma,
                 }
                 goto uncharge_out;
         }
-        do_set_pte(vma, address, new_page, pte, true, true, false);
+        do_set_pte(vma, address, new_page, pte, true, true);
         mem_cgroup_commit_charge(new_page, memcg, false, false);
         lru_cache_add_active_or_unevictable(new_page, vma);
         pte_unmap_unlock(pte, ptl);
@@ -3164,7 +3143,7 @@ static int do_shared_fault(struct mm_struct *mm, struct vm_area_struct *vma,
                 put_page(fault_page);
                 return ret;
         }
-        do_set_pte(vma, address, fault_page, pte, true, false, false);
+        do_set_pte(vma, address, fault_page, pte, true, false);
         pte_unmap_unlock(pte, ptl);
 
         if (set_page_dirty(fault_page))