linux-kernel - [RFC][PATCH 0/6] mm, highmem: kmap

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Message-Id: <20100819201317.673172547@chello.nl>
Date:	Thu, 19 Aug 2010 22:13:17 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Russell King <rmk@....linux.org.uk>,
	David Howells <dhowells@...hat.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	David Miller <davem@...emloft.net>,
	Paul Mackerras <paulus@...ba.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-arch@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [RFC][PATCH 0/6] mm, highmem: kmap_atomic rework

This patch-set reworks the kmap_atomic API to be a stack based, instead of
static slot based. Some might remember this from last year, some not ;-)

The advantage is that you no longer need to worry about KM_foo, the
disadvantage is that kmap_atomic/kunmap_atomic now needs to be strictly
nested (CONFIG_HIGHMEM_DEBUG should complain in case its not) -- and of
course its a big massive patch changing a widely used API.

The patch-set is currently based on tip/master as of today, and compile
tested on: i386-all{mod,yes}config, mips-yosemite_defconfig,
sparc-sparc32_defconfig, powerpc-ppc6xx_defconfig, and some arm config.

(Sorry dhowells, I again couldn't find frv/mn10300 compilers)

Boot tested with i386-defconfig on kvm.

Since its a rather large set, and somewhat tedious to rebase, I wanted to
ask how to go about getting this merged?

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