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    Subject[PATCH v4 09/20] reiserfs: use ->invalidatepage() length argument
    Date
    ->invalidatepage() aop now accepts range to invalidate so we can make
    use of it in reiserfs_invalidatepage()

    Signed-off-by: Lukas Czerner <lczerner@redhat.com>
    Cc: reiserfs-devel@vger.kernel.org
    ---
    fs/reiserfs/inode.c | 9 +++++++--
    1 files changed, 7 insertions(+), 2 deletions(-)

    diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
    index 808e02e..e963164 100644
    --- a/fs/reiserfs/inode.c
    +++ b/fs/reiserfs/inode.c
    @@ -2975,11 +2975,13 @@ static void reiserfs_invalidatepage(struct page *page, unsigned int offset,
    struct buffer_head *head, *bh, *next;
    struct inode *inode = page->mapping->host;
    unsigned int curr_off = 0;
    + unsigned int stop = offset + length;
    + int partial_page = (offset || length < PAGE_CACHE_SIZE);
    int ret = 1;

    BUG_ON(!PageLocked(page));

    - if (offset == 0)
    + if (!partial_page)
    ClearPageChecked(page);

    if (!page_has_buffers(page))
    @@ -2991,6 +2993,9 @@ static void reiserfs_invalidatepage(struct page *page, unsigned int offset,
    unsigned int next_off = curr_off + bh->b_size;
    next = bh->b_this_page;

    + if (next_off > stop)
    + goto out;
    +
    /*
    * is this block fully invalidated?
    */
    @@ -3009,7 +3014,7 @@ static void reiserfs_invalidatepage(struct page *page, unsigned int offset,
    * The get_block cached value has been unconditionally invalidated,
    * so real IO is not possible anymore.
    */
    - if (!offset && ret) {
    + if (!partial_page && ret) {
    ret = try_to_release_page(page, 0);
    /* maybe should BUG_ON(!ret); - neilb */
    }
    --
    1.7.7.6


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