4 files changed, 12 insertions, 5 deletions

diff --git a/mm/filemap.c b/mm/filemap.c
index a82fbe4c9e8e..5020b280a771 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2581,7 +2581,6 @@ EXPORT_SYMBOL(generic_perform_write);
  * @iocb:       IO state structure (file, offset, etc.)
  * @iov:        vector with data to write
  * @nr_segs:    number of segments in the vector
- * @ppos:       position where to write
  *
  * This function does all the work needed for actually writing data to a
  * file. It does all basic checks, removes SUID from the file, updates
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 64635f5278ff..b4b1feba6472 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1536,16 +1536,23 @@ pmd_t *page_check_address_pmd(struct page *page,
                               enum page_check_address_pmd_flag flag,
                               spinlock_t **ptl)
 {
+        pgd_t *pgd;
+        pud_t *pud;
         pmd_t *pmd;
 
         if (address & ~HPAGE_PMD_MASK)
                 return NULL;
 
-        pmd = mm_find_pmd(mm, address);
-        if (!pmd)
+        pgd = pgd_offset(mm, address);
+        if (!pgd_present(*pgd))
                 return NULL;
+        pud = pud_offset(pgd, address);
+        if (!pud_present(*pud))
+                return NULL;
+        pmd = pmd_offset(pud, address);
+
         *ptl = pmd_lock(mm, pmd);
-        if (pmd_none(*pmd))
+        if (!pmd_present(*pmd))
                 goto unlock;
         if (pmd_page(*pmd) != page)
                 goto unlock;
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index dd30f22b35e0..246192929a2d 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1172,6 +1172,7 @@ static void return_unused_surplus_pages(struct hstate *h,
         while (nr_pages--) {
                 if (!free_pool_huge_page(h, &node_states[N_MEMORY], 1))
                         break;
+                cond_resched_lock(&hugetlb_lock);
         }
 }
 
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 9b6497eda806..3f56c8deb3c0 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1158,7 +1158,7 @@ unsigned long reclaim_clean_pages_from_list(struct zone *zone,
                         TTU_UNMAP|TTU_IGNORE_ACCESS,
                         &dummy1, &dummy2, &dummy3, &dummy4, &dummy5, true);
         list_splice(&clean_pages, page_list);
-        __mod_zone_page_state(zone, NR_ISOLATED_FILE, -ret);
+        mod_zone_page_state(zone, NR_ISOLATED_FILE, -ret);
         return ret;
 }