lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1195526155.6970.32.camel@pasglop>
Date:	Tue, 20 Nov 2007 13:35:55 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Roland Dreier <rdreier@...co.com>
Cc:	David Miller <davem@...emloft.net>,
	James.Bottomley@...senPartnership.com,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	rmk@....linux.org.uk
Subject: Re: SCSI breakage on non-cache coherent architectures


On Mon, 2007-11-19 at 18:10 -0800, Roland Dreier wrote:
> 
> I wrapped this ugliness up inside the macro back in what I posted in
> 2002 (http://lkml.org/lkml/2002/6/12/234):
> 
> #define __dma_buffer __dma_buffer_line(__LINE__)
> #define __dma_buffer_line(line) __dma_buffer_expand_line(line)
> #define __dma_buffer_expand_line(line) \
>         __attribute__ ((aligned(L1_CACHE_BYTES))); \
>         char __dma_pad_ ## line [0] __attribute__
> ((aligned(L1_CACHE_BYTES)))
> 
> then you just need to tag the actual member like:
> 
>         char foo[3] __dma_buffer;

That's actually not too bad ... 

I'm having a problem with reverting SCSI to use an allocation for the
sense buffer, because it can fail and the new scso_eh_prep_cmnd() isn't
supposed to return a failure. I've changed that but now I get into
trying to fix the various drivers that use it without checking the
result code and it's becoming much more complicated than initially
thought.

So I may do the above instead and revive your patch.

Any objection ? James ? David ?

Cheers,
Ben.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ