Ordinarily, memory holes in flatmem still have a valid memmap and is safe
to use. However, an architecture (ARM) frees up the memmap backing memory
holes on the assumption it is never used. /proc/pagetypeinfo reads the
whole range of pages in a zone believing that the memmap is valid and that
pfn_valid will return false if it is not. On ARM, freeing the memmap breaks
the page->zone linkages even though pfn_valid() returns true and the kernel
can oops shortly afterwards due to accessing a bogus struct zone *.
This patch lets architectures say when FLATMEM can have holes in the
memmap. Rather than an expensive check for valid memory, /proc/pagetypeinfo
will confirm that the page linkages are still valid by checking page->zone
is still the expected zone. The lookup of page_zone is safe as there is a
limited range of memory that is accessed when calling page_zone. Even if
page_zone happens to return the correct zone, the impact is that the counters
in /proc/pagetypeinfo are slightly off but fragmentation monitoring is
unlikely to be relevant on an embedded system.
Reported-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Tested-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This patch changes arm to use the new bcd2bin/bin2bcd functions instead
of the obsolete BCD_TO_BIN/BIN_TO_BCD macros.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Taken from omap 97b705ad835f1481270c4b67b402d6e37fa8ad15:
ARM: OMAP: Misc compile fixes after syncing with mainline
Also fix 2430 smc91x to use IRQ_LOWLEVEL.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Fix the S3C2443 clock register definitions for selecting the EPLL
reference clock described by S3C2443_CLKSRC_EPLLREF.
Signed-off-by: Wei Shuai <cpuwolf@gmail.com>
[ben-linux@fluff.org: minor description fixes]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
The first spi bus is registered with number 0, but
the board data says that the device on it is registered
on bus 1.
Move the spi bus to bus 1 to keep the compatibility with the
original board-support patches.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Fix the following sparse warnings in arch/arm/plat-s3c24xx/pwm.c:
warning: symbol 's3c_device_timer' was not declared. Should it be static?
warning: symbol 'pwm_calc_tin' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Fix the following sparse warnings in arch/arm/plat-s3c24xx/pwm-clock.c:
warning: symbol 'clk_timer_scaler' was not declared. Should it be static?
warning: symbol 'clk_timer_tclk' was not declared. Should it be static?
warning: symbol 'clk_timer_tdiv' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Fix the following problems spotted by sparse:
warning: symbol 's3c24xx_gpiolib_input' was not declared. Should it be static?
warning: symbol 's3c24xx_gpiolib_output' was not declared. Should it be static?
warning: symbol 's3c24xx_gpiolib_set' was not declared. Should it be static?
warning: symbol 's3c24xx_gpiolib_get' was not declared. Should it be static?
warning: symbol 'gpios' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Fix the following sparse errors in arch/arm/mach-s3c2410/nor-simtec.c:
53:27: warning: symbol 'simtec_nor_pdata' was not declared. Should it be static?
77:13: warning: symbol 'nor_simtec_init' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This patch lets the files using linux/version.h match the files that
#include it.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Register UART1 on QNAP TS-209 and TS-409 because the PIC controller
is connected to it. This fixes a regression from 2.6.26.
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
The lm75 driver was recently converted to the new-style binding,
so now it can be loaded from the DNS-323 support code.
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Tested-by: Tobias Poschwatta <tp@fonz.de>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Flash needs to be set up before we can try to read the MAC address
from there.
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
The Kurobox Pro crashes when any of the PCI controller registers
are accessed. This patch adds a function to the Orion PCI handling
code that board support code can call to disable enumerating the
PCI bus entirely, and makes the Kurobox Pro PCI-related init code
call this function.
Signed-off-by: Per Andersson <avtobiff@gmail.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Fix
arch/arm/mach-pxa/pxa300.c:94: error: 'CKEN_MMC3' undeclared here (not in a function)
when building for PXA300.
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This patch against 2.6.27-rc3 does the following changes to FSG-3 setup code:
1) Enable RTC on FSG-3 (proper name is needed). This change is needed due to a recent change in i2c.
2) i variable is only used when compiling for big endian.
So move its declaration to ARMEB ifdef to silence the warning when compiling for LE.
Mailing list link:
http://lists.arm.linux.org.uk/lurker/message/20080813.091556.cae2917e.en.html
Signed-off-by: Tomasz Chmielewski <mangoo@wpkg.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Jean-Christophe DUBOIS
Russell King
Mel Gorman
Adrian Bunk
Harvey Harrison
Wei Shuai
Ben Dooks
Mark Brown
Nicolas Pitre
Martin Michlmayr
Per Andersson
Mike Rapoport
Tomasz Chmielewski