On Wed, Jan 29 2003, Benjamin Herrenschmidt wrote:
> On Wed, 2003-01-29 at 16:38, Jens Axboe wrote:
> > No, any b_data < PAGE_OFFSET is not wrong, that's the point. For highmem
> > b_page, b_data will be the offset into the page. So it could be 2048,
> > for instance.
>
> In the other if() case, yes ;)
b_data < PAGE_SIZE would not be a bug in the other case, if
PageHighmem(bh->b_page). If !PageHighmem(bh->b_page), then b_data <
PAGE_OFFSET would be a bug, yes.
But lets drop this now, it's getting way silly! :)
> All I wanted to spot is that < PAGE_OFFSET would catch the PAGE_SIZE bug
> as well ;) But that's not a problem in real life anyway it seems.
That is correct, but as I said it's nice to separate them because it's
two bugs really. And the one I wanted to catch was number 1, and that's
the one I put in. EOD?
-- Jens Axboe- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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