linux/include
Jiang Liu 69afade72a mm: introduce common help functions to deal with reserved/managed pages
The original goal of this patchset is to fix the bug reported by

  https://bugzilla.kernel.org/show_bug.cgi?id=53501

Now it has also been expanded to reduce common code used by memory
initializion.

This is the first part, which applies to v3.9-rc1.

It introduces following common helper functions to simplify
free_initmem() and free_initrd_mem() on different architectures:

adjust_managed_page_count():
	will be used to adjust totalram_pages, totalhigh_pages,
	zone->managed_pages when reserving/unresering a page.

__free_reserved_page():
	free a reserved page into the buddy system without adjusting
	page statistics info

free_reserved_page():
	free a reserved page into the buddy system and adjust page
	statistics info

mark_page_reserved():
	mark a page as reserved and adjust page statistics info

free_reserved_area():
	free a continous ranges of pages by calling free_reserved_page()

free_initmem_default():
	default method to free __init pages.

We have only tested these patchset on x86 platforms, and have done basic
compliation tests using cross-compilers from ftp.kernel.org.  That means
some code may not pass compilation on some architectures.  So any help to
test this patchset are welcomed!

There are several other parts still under development:
Part2: introduce free_highmem_page() to simplify freeing highmem pages
Part3: refine code to manage totalram_pages, totalhigh_pages and
	zone->managed_pages
Part4: introduce helper functions to simplify mem_init() and remove the
	global variable num_physpages.

This patch:

Code to deal with reserved/managed pages are duplicated by many
architectures, so introduce common help functions to reduce duplicated
code.  These common help functions will also be used to concentrate code
to modify totalram_pages and zone->managed_pages, which makes the code
much more clear.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: David Howells <dhowells@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Cc: Jiang Liu <liuj97@gmail.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29 15:54:29 -07:00
..
acpi Fixes: 2013-03-12 20:25:53 -07:00
asm-generic x86-32: Fix possible incomplete TLB invalidate with PAE pagetables 2013-04-12 16:56:47 -07:00
clocksource ImgTec Meta architecture changes for v3.9-rc1 2013-03-03 12:06:09 -08:00
crypto
drm drm/radeon: add Richland pci ids 2013-03-15 18:47:19 -04:00
keys
linux mm: introduce common help functions to deal with reserved/managed pages 2013-04-29 15:54:29 -07:00
math-emu
media
memory
misc
net net: fix incorrect credentials passing 2013-04-20 16:56:42 -04:00
pcmcia pcmcia/ds.h: introduce helper for pcmcia_driver module boilerplate 2013-03-15 12:26:03 -07:00
ras edac: add support for error type "Info" 2013-02-21 14:16:27 -03:00
rdma IB/core: Add "type 2" memory windows support 2013-02-21 11:51:45 -08:00
rxrpc
scsi libfc, fcoe, bnx2fc: Split fc_disc_init into fc_disc_{init, config} 2013-03-25 16:03:03 -07:00
sound Merge remote-tracking branch 'asoc/fix/max98090' into asoc-next 2013-03-26 14:08:03 +00:00
target target: Rename spc_get_write_same_sectors -> sbc_get_write_same_sectors 2013-02-23 12:46:14 -08:00
trace mm: trace filemap add and del 2013-04-29 15:54:28 -07:00
uapi USB patches for 3.10-rc1 2013-04-29 12:19:23 -07:00
video fbdev: Merge fbdev topic branches 2013-04-15 12:00:38 +03:00
xen xen: drop tracking of IRQ vector 2013-04-16 15:05:45 -04:00
Kbuild