netns xfrm: fix "ip xfrm state|policy count" misreport

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

diff --git a/fs/mpage.c b/fs/mpage.c
index 552b80b..42381bd 100644 (file)
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -82,7 +82,7 @@ static void mpage_end_io_write(struct bio *bio, int err)
        bio_put(bio);
 }
 
-struct bio *mpage_bio_submit(int rw, struct bio *bio)
+static struct bio *mpage_bio_submit(int rw, struct bio *bio)
 {
        bio->bi_end_io = mpage_end_io_read;
        if (rw == WRITE)
@@ -90,7 +90,6 @@ struct bio *mpage_bio_submit(int rw, struct bio *bio)
        submit_bio(rw, bio);
        return NULL;
 }
-EXPORT_SYMBOL(mpage_bio_submit);
 
 static struct bio *
 mpage_alloc(struct block_device *bdev,
@@ -241,7 +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;
                }
 
@@ -308,7 +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];
@@ -378,7 +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);
 
@@ -411,7 +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)
@@ -437,7 +440,14 @@ EXPORT_SYMBOL(mpage_readpage);
  * just allocate full-size (16-page) BIOs.
  */
 
-int __mpage_writepage(struct page *page, struct writeback_control *wbc,
+struct mpage_data {
+       struct bio *bio;
+       sector_t last_block_in_bio;
+       get_block_t *get_block;
+       unsigned use_writepage;
+};
+
+static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
                      void *data)
 {
        struct mpage_data *mpd = data;
@@ -646,7 +656,6 @@ out:
        mpd->bio = bio;
        return ret;
 }
-EXPORT_SYMBOL(__mpage_writepage);
 
 /**
  * mpage_writepages - walk the list of dirty pages of the given address space & writepage() all of them