The rpc server does not require that service threads take the BKL.

[safe/jmp/linux-2.6] / fs / mpage.c

diff --git a/fs/mpage.c b/fs/mpage.c
index 235e4d3..42381bd 100644 (file)
--- 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
@@ -240,7 +240,6 @@ 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 +306,10 @@ 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 +379,8 @@ 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 +413,8 @@ 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 +439,7 @@ 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 +448,7 @@ 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;