mm: change invalidatepage prototype to accept length

[mirror_ubuntu-bionic-kernel.git] / mm / truncate.c

diff --git a/mm/truncate.c b/mm/truncate.c
index c75b736e54b793f338fce25f35afa60eb0faf5ef..fdba083f0d71f4792563052e0c324ac7b6fd330f 100644 (file)
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -26,7 +26,8 @@
 /**
  * do_invalidatepage - invalidate part or all of a page
  * @page: the page which is affected
- * @offset: the index of the truncation point
+ * @offset: start of the range to invalidate
+ * @length: length of the range to invalidate
  *
  * do_invalidatepage() is called when all or part of the page has become
  * invalidated by a truncate operation.
@@ -37,16 +38,18 @@
  * point.  Because the caller is about to free (and possibly reuse) those
  * blocks on-disk.
  */
-void do_invalidatepage(struct page *page, unsigned long offset)
+void do_invalidatepage(struct page *page, unsigned int offset,
+                      unsigned int length)
 {
-       void (*invalidatepage)(struct page *, unsigned long);
+       void (*invalidatepage)(struct page *, unsigned int, unsigned int);
+
        invalidatepage = page->mapping->a_ops->invalidatepage;
 #ifdef CONFIG_BLOCK
        if (!invalidatepage)
                invalidatepage = block_invalidatepage;
 #endif
        if (invalidatepage)
-               (*invalidatepage)(page, offset);
+               (*invalidatepage)(page, offset, length);
 }
 
 static inline void truncate_partial_page(struct page *page, unsigned partial)
@@ -54,7 +57,7 @@ static inline void truncate_partial_page(struct page *page, unsigned partial)
        zero_user_segment(page, partial, PAGE_CACHE_SIZE);
        cleancache_invalidate_page(page->mapping, page);
        if (page_has_private(page))
-               do_invalidatepage(page, partial);
+               do_invalidatepage(page, partial, PAGE_CACHE_SIZE - partial);
 }
 
 /*
@@ -103,7 +106,7 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
                return -EIO;
 
        if (page_has_private(page))
-               do_invalidatepage(page, 0);
+               do_invalidatepage(page, 0, PAGE_CACHE_SIZE);
 
        cancel_dirty_page(page, PAGE_CACHE_SIZE);