i2c: Correct struct i2c_driver doc about detection

[linux.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 91f69459d3e8b3bf8075574e145788b0b40c4a6f..57361708d1a57d7bc11c8f34d269a35c50317dbb 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1343,8 +1343,11 @@ static void unmap_single_vma(struct mmu_gather *tlb,
                         * Since no pte has actually been setup, it is
                         * safe to do nothing in this case.
                         */
-                       if (vma->vm_file)
-                               unmap_hugepage_range(vma, start, end, NULL);
+                       if (vma->vm_file) {
+                               mutex_lock(&vma->vm_file->f_mapping->i_mmap_mutex);
+                               __unmap_hugepage_range_final(tlb, vma, start, end, NULL);
+                               mutex_unlock(&vma->vm_file->f_mapping->i_mmap_mutex);
+                       }
                } else
                        unmap_page_range(tlb, vma, start, end, details);
        }
@@ -2647,6 +2650,9 @@ reuse:
                if (!page_mkwrite) {
                        wait_on_page_locked(dirty_page);
                        set_page_dirty_balance(dirty_page, page_mkwrite);
+                       /* file_update_time outside page_lock */
+                       if (vma->vm_file)
+                               file_update_time(vma->vm_file);
                }
                put_page(dirty_page);
                if (page_mkwrite) {
@@ -2664,10 +2670,6 @@ reuse:
                        }
                }
 
-               /* file_update_time outside page_lock */
-               if (vma->vm_file)
-                       file_update_time(vma->vm_file);
-
                return ret;
        }
 
@@ -3336,12 +3338,13 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
 
        if (dirty_page) {
                struct address_space *mapping = page->mapping;
+               int dirtied = 0;
 
                if (set_page_dirty(dirty_page))
-                       page_mkwrite = 1;
+                       dirtied = 1;
                unlock_page(dirty_page);
                put_page(dirty_page);
-               if (page_mkwrite && mapping) {
+               if ((dirtied || page_mkwrite) && mapping) {
                        /*
                         * Some device drivers do not set page.mapping but still
                         * dirty their pages
@@ -3350,7 +3353,7 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
                }
 
                /* file_update_time outside page_lock */
-               if (vma->vm_file)
+               if (vma->vm_file && !page_mkwrite)
                        file_update_time(vma->vm_file);
        } else {
                unlock_page(vmf.page);
@@ -3938,7 +3941,7 @@ void print_vma_addr(char *prefix, unsigned long ip)
                        free_page((unsigned long)buf);
                }
        }
-       up_read(&current->mm->mmap_sem);
+       up_read(&mm->mmap_sem);
 }
 
 #ifdef CONFIG_PROVE_LOCKING