See the definition of get_block_t
typedef int (get_block_t)(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
On 8/3/08, Manish Katiyar <mkatiyar@xxxxxxxxx> wrote:
> ok... I know i am going to be embarrassed but I am confused by the
> below function. The last parameter in do_mpage_readpage() is of type
> get_block_t, but when passed to block_read_full_page() it gets passed
> as get_block_t *.
>
>
> static struct bio * do_mpage_readpage(............., get_block_t get_block)
> {
> ................
> ................
> if (page_has_buffers(page))
> goto confused;
> .................
> confused:
> if (!PageUptodate(page))
> block_read_full_page(page, get_block);
> .........
> }
>
> int block_read_full_page(struct page *page, get_block_t *get_block) {
> .........
> ..........
> }
>
>
> How does this work ? :-( ....... Isn't gcc supposed to catch this and
> flag warning unless I am missing something very obvious.
>
> Thanks -
> Manish
>
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