Re: new bio: compile fix for alpha

[Jens Axboe <axboe@suse.de>]

On Thu, Dec 06 2001, Ivan Kokshaysky wrote:
> On Thu, Nov 29, 2001 at 03:23:39PM +0100, Jens Axboe wrote:
> > Please send whatever you find, thanks.
> 
> Well, I think this one is critical - in -pre4 BIO_CONTIG macro
> has been changed:
> -	(bio_to_phys((bio)) + bio_size((bio)) == bio_to_phys((nxt)))
> +	(bvec_to_phys(__BVEC_END((bio)) + (bio)->bi_size) ==bio_to_phys((nxt)))
> 		      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> This means that you add size in bytes to the `struct bio_vec' pointer,
> which is obviously bogus. I wonder why this typo didn't expose itself
> on x86 - on alpha I've got an oops on very first disk i/o in partition
> check...

Irk, good spotting. Thanks!

> The rest is cleaning up some format vs. arg inconsistency on 64-bit
> platforms.
> Oh, and yet another [incorrect] BUG_ON macro on alpha killed.

Applied, although I think we'll make BUG_ON a kernel generic and not
platform specific as per Rusty's patch.

-- 
Jens Axboe