X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fmpage.c;h=fd56ca2ea55611314a841c9a65abba0c88b6ffa6;hb=b0fb75ad5c8ca205396d7a493c9be5a5da802747;hp=235e4d3873a88d17837f1a9551f09664c8ffcb54;hpb=78a4a50a86b0a54f7ecbc164267b6c762760254c;p=safe%2Fjmp%2Flinux-2.6

diff --git a/fs/mpage.c b/fs/mpage.c
index 235e4d3..fd56ca2 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -6,7 +6,7 @@
  * Contains functions related to preparing and submitting BIOs which contain
  * multiple pagecache pages.
  *
- * 15May2002	akpm@zip.com.au
+ * 15May2002	Andrew Morton
  *		Initial version
  * 27Jun2002	axboe@suse.de
  *		use bio_add_page() to build bio's just the right size
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/mm.h>
 #include <linux/kdev_t.h>
+#include <linux/gfp.h>
 #include <linux/bio.h>
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
@@ -240,7 +241,6 @@ do_mpage_readpage(struct bio *bio, struct page *page, unsigned nr_pages,
 				first_hole = page_block;
 			page_block++;
 			block_in_file++;
-			clear_buffer_mapped(map_bh);
 			continue;
 		}
 
@@ -307,7 +307,10 @@ alloc_new:
 		goto alloc_new;
 	}
 
-	if (buffer_boundary(map_bh) || (first_hole != blocks_per_page))
+	relative_block = block_in_file - *first_logical_block;
+	nblocks = map_bh->b_size >> blkbits;
+	if ((buffer_boundary(map_bh) && relative_block == nblocks) ||
+	    (first_hole != blocks_per_page))
 		bio = mpage_bio_submit(READ, bio);
 	else
 		*last_block_in_bio = blocks[blocks_per_page - 1];
@@ -377,7 +380,8 @@ mpage_readpages(struct address_space *mapping, struct list_head *pages,
 	struct buffer_head map_bh;
 	unsigned long first_logical_block = 0;
 
-	clear_buffer_mapped(&map_bh);
+	map_bh.b_state = 0;
+	map_bh.b_size = 0;
 	for (page_idx = 0; page_idx < nr_pages; page_idx++) {
 		struct page *page = list_entry(pages->prev, struct page, lru);
 
@@ -410,7 +414,8 @@ int mpage_readpage(struct page *page, get_block_t get_block)
 	struct buffer_head map_bh;
 	unsigned long first_logical_block = 0;
 
-	clear_buffer_mapped(&map_bh);
+	map_bh.b_state = 0;
+	map_bh.b_size = 0;
 	bio = do_mpage_readpage(bio, page, 1, &last_block_in_bio,
 			&map_bh, &first_logical_block, get_block);
 	if (bio)
@@ -435,6 +440,7 @@ EXPORT_SYMBOL(mpage_readpage);
  * written, so it can intelligently allocate a suitably-sized BIO.  For now,
  * just allocate full-size (16-page) BIOs.
  */
+
 struct mpage_data {
 	struct bio *bio;
 	sector_t last_block_in_bio;
@@ -443,7 +449,7 @@ struct mpage_data {
 };
 
 static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
-			     void *data)
+		      void *data)
 {
 	struct mpage_data *mpd = data;
 	struct bio *bio = mpd->bio;
@@ -556,7 +562,7 @@ page_is_mapped:
 	if (page->index >= end_index) {
 		/*
 		 * The page straddles i_size.  It must be zeroed out on each
-		 * and every writepage invokation because it may be mmapped.
+		 * and every writepage invocation because it may be mmapped.
 		 * "A file is mapped in multiples of the page size.  For a file
 		 * that is not a multiple of the page size, the remaining memory
 		 * is zeroed when mapped, and writes to that region are not