mm: fix faulty initialization in vmalloc_init()

[android-x86/kernel.git] / fs / buffer.c

diff --git a/fs/buffer.c b/fs/buffer.c
index 49c9aad..330cbce 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -968,6 +968,7 @@ init_page_buffers(struct page *page, struct block_device *bdev,
        struct buffer_head *head = page_buffers(page);
        struct buffer_head *bh = head;
        int uptodate = PageUptodate(page);
+       sector_t end_block = blkdev_max_block(I_BDEV(bdev->bd_inode));
 
        do {
                if (!buffer_mapped(bh)) {
@@ -976,7 +977,8 @@ init_page_buffers(struct page *page, struct block_device *bdev,
                        bh->b_blocknr = block;
                        if (uptodate)
                                set_buffer_uptodate(bh);
-                       set_buffer_mapped(bh);
+                       if (block < end_block)
+                               set_buffer_mapped(bh);
                }
                block++;
                bh = bh->b_this_page;
@@ -1902,10 +1904,8 @@ int __block_write_begin(struct page *page, loff_t pos, unsigned len,
                if (!buffer_uptodate(*wait_bh))
                        err = -EIO;
        }
-       if (unlikely(err)) {
+       if (unlikely(err))
                page_zero_new_buffers(page, from, to);
-               ClearPageUptodate(page);
-       }
        return err;
 }
 EXPORT_SYMBOL(__block_write_begin);