linux-kernel - Re: [PATCH] asm-generic: add dma-mapping-linear.h

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: <20090601082943.GA5550@flint.arm.linux.org.uk>
Date:	Mon, 1 Jun 2009 09:29:43 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	arnd@...db.de, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org
Subject: Re: [PATCH] asm-generic: add dma-mapping-linear.h

On Mon, Jun 01, 2009 at 05:08:09PM +0900, FUJITA Tomonori wrote:
> This adds a version of the dma-mapping API to asm-generic that can be
> used by most architectures that only need a linear mapping.

It depends what is meant by "linear mapping".

If that's just a way of saying "all that needs to be done for the
DMA streaming APIs is to flush the cache" then the vast majority of
ARMs fall into that category.

The DMA bounce code is a broken design concept that really needs to
be put to death.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
--
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/