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r: 179746
b: refs/heads/master
c: b8be634
h: refs/heads/master
v: v3
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Linus Torvalds committed Jan 24, 2010
1 parent 6a11051 commit affd64d
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2 changes: 1 addition & 1 deletion [refs]
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---
refs/heads/master: f5e2bae0aad03164ffc7ce9dfeee6608e2c87dba
refs/heads/master: b8be634e01b400fa2528848ad0cd6a5580a15bc4
8 changes: 2 additions & 6 deletions trunk/.gitignore
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Expand Up @@ -22,6 +22,7 @@
*.lst
*.symtypes
*.order
modules.builtin
*.elf
*.bin
*.gz
Expand All @@ -36,6 +37,7 @@
tags
TAGS
vmlinux
vmlinuz
System.map
Module.markers
Module.symvers
Expand All @@ -45,14 +47,8 @@ Module.symvers
#
# Generated include files
#
include/asm
include/asm-*/asm-offsets.h
include/config
include/linux/autoconf.h
include/linux/compile.h
include/linux/version.h
include/linux/utsrelease.h
include/linux/bounds.h
include/generated

# stgit generated dirs
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18 changes: 10 additions & 8 deletions trunk/Documentation/ABI/testing/sysfs-bus-usb
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Expand Up @@ -21,25 +21,27 @@ Contact: Alan Stern <stern@rowland.harvard.edu>
Description:
Each USB device directory will contain a file named
power/level. This file holds a power-level setting for
the device, one of "on", "auto", or "suspend".
the device, either "on" or "auto".

"on" means that the device is not allowed to autosuspend,
although normal suspends for system sleep will still
be honored. "auto" means the device will autosuspend
and autoresume in the usual manner, according to the
capabilities of its driver. "suspend" means the device
is forced into a suspended state and it will not autoresume
in response to I/O requests. However remote-wakeup requests
from the device may still be enabled (the remote-wakeup
setting is controlled separately by the power/wakeup
attribute).
capabilities of its driver.

During normal use, devices should be left in the "auto"
level. The other levels are meant for administrative uses.
level. The "on" level is meant for administrative uses.
If you want to suspend a device immediately but leave it
free to wake up in response to I/O requests, you should
write "0" to power/autosuspend.

Device not capable of proper suspend and resume should be
left in the "on" level. Although the USB spec requires
devices to support suspend/resume, many of them do not.
In fact so many don't that by default, the USB core
initializes all non-hub devices in the "on" level. Some
drivers may change this setting when they are bound.

What: /sys/bus/usb/devices/.../power/persist
Date: May 2007
KernelVersion: 2.6.23
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44 changes: 44 additions & 0 deletions trunk/Documentation/ABI/testing/sysfs-memory-page-offline
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What: /sys/devices/system/memory/soft_offline_page
Date: Sep 2009
KernelVersion: 2.6.33
Contact: andi@firstfloor.org
Description:
Soft-offline the memory page containing the physical address
written into this file. Input is a hex number specifying the
physical address of the page. The kernel will then attempt
to soft-offline it, by moving the contents elsewhere or
dropping it if possible. The kernel will then be placed
on the bad page list and never be reused.

The offlining is done in kernel specific granuality.
Normally it's the base page size of the kernel, but
this might change.

The page must be still accessible, not poisoned. The
kernel will never kill anything for this, but rather
fail the offline. Return value is the size of the
number, or a error when the offlining failed. Reading
the file is not allowed.

What: /sys/devices/system/memory/hard_offline_page
Date: Sep 2009
KernelVersion: 2.6.33
Contact: andi@firstfloor.org
Description:
Hard-offline the memory page containing the physical
address written into this file. Input is a hex number
specifying the physical address of the page. The
kernel will then attempt to hard-offline the page, by
trying to drop the page or killing any owner or
triggering IO errors if needed. Note this may kill
any processes owning the page. The kernel will avoid
to access this page assuming it's poisoned by the
hardware.

The offlining is done in kernel specific granuality.
Normally it's the base page size of the kernel, but
this might change.

Return value is the size of the number, or a error when
the offlining failed.
Reading the file is not allowed.
2 changes: 2 additions & 0 deletions trunk/Documentation/Changes
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Expand Up @@ -49,6 +49,8 @@ o oprofile 0.9 # oprofiled --version
o udev 081 # udevinfo -V
o grub 0.93 # grub --version
o mcelog 0.6
o iptables 1.4.1 # iptables -V


Kernel compilation
==================
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12 changes: 6 additions & 6 deletions trunk/Documentation/DocBook/mtdnand.tmpl
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Expand Up @@ -174,15 +174,15 @@
</para>
<programlisting>
static struct mtd_info *board_mtd;
static unsigned long baseaddr;
static void __iomem *baseaddr;
</programlisting>
<para>
Static example
</para>
<programlisting>
static struct mtd_info board_mtd;
static struct nand_chip board_chip;
static unsigned long baseaddr;
static void __iomem *baseaddr;
</programlisting>
</sect1>
<sect1 id="Partition_defines">
Expand Down Expand Up @@ -283,8 +283,8 @@ int __init board_init (void)
}

/* map physical address */
baseaddr = (unsigned long)ioremap(CHIP_PHYSICAL_ADDRESS, 1024);
if(!baseaddr){
baseaddr = ioremap(CHIP_PHYSICAL_ADDRESS, 1024);
if (!baseaddr) {
printk("Ioremap to access NAND chip failed\n");
err = -EIO;
goto out_mtd;
Expand Down Expand Up @@ -316,7 +316,7 @@ int __init board_init (void)
goto out;

out_ior:
iounmap((void *)baseaddr);
iounmap(baseaddr);
out_mtd:
kfree (board_mtd);
out:
Expand All @@ -341,7 +341,7 @@ static void __exit board_cleanup (void)
nand_release (board_mtd);

/* unmap physical address */
iounmap((void *)baseaddr);
iounmap(baseaddr);

/* Free the MTD device structure */
kfree (board_mtd);
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2 changes: 1 addition & 1 deletion trunk/Documentation/IO-mapping.txt
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Expand Up @@ -157,7 +157,7 @@ For such memory, you can do things like
* access only the 640k-1MB area, so anything else
* has to be remapped.
*/
char * baseptr = ioremap(0xFC000000, 1024*1024);
void __iomem *baseptr = ioremap(0xFC000000, 1024*1024);

/* write a 'A' to the offset 10 of the area */
writeb('A',baseptr+10);
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File renamed without changes.
66 changes: 66 additions & 0 deletions trunk/Documentation/acpi/method-customizing.txt
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Linux ACPI Custom Control Method How To
=======================================

Written by Zhang Rui <rui.zhang@intel.com>


Linux supports customizing ACPI control methods at runtime.

Users can use this to
1. override an existing method which may not work correctly,
or just for debugging purposes.
2. insert a completely new method in order to create a missing
method such as _OFF, _ON, _STA, _INI, etc.
For these cases, it is far simpler to dynamically install a single
control method rather than override the entire DSDT, because kernel
rebuild/reboot is not needed and test result can be got in minutes.

Note: Only ACPI METHOD can be overridden, any other object types like
"Device", "OperationRegion", are not recognized.
Note: The same ACPI control method can be overridden for many times,
and it's always the latest one that used by Linux/kernel.

1. override an existing method
a) get the ACPI table via ACPI sysfs I/F. e.g. to get the DSDT,
just run "cat /sys/firmware/acpi/tables/DSDT > /tmp/dsdt.dat"
b) disassemble the table by running "iasl -d dsdt.dat".
c) rewrite the ASL code of the method and save it in a new file,
d) package the new file (psr.asl) to an ACPI table format.
Here is an example of a customized \_SB._AC._PSR method,

DefinitionBlock ("", "SSDT", 1, "", "", 0x20080715)
{
External (ACON)

Method (\_SB_.AC._PSR, 0, NotSerialized)
{
Store ("In AC _PSR", Debug)
Return (ACON)
}
}
Note that the full pathname of the method in ACPI namespace
should be used.
And remember to use "External" to declare external objects.
e) assemble the file to generate the AML code of the method.
e.g. "iasl psr.asl" (psr.aml is generated as a result)
f) mount debugfs by "mount -t debugfs none /sys/kernel/debug"
g) override the old method via the debugfs by running
"cat /tmp/psr.aml > /sys/kernel/debug/acpi/custom_method"

2. insert a new method
This is easier than overriding an existing method.
We just need to create the ASL code of the method we want to
insert and then follow the step c) ~ g) in section 1.

3. undo your changes
The "undo" operation is not supported for a new inserted method
right now, i.e. we can not remove a method currently.
For an overrided method, in order to undo your changes, please
save a copy of the method original ASL code in step c) section 1,
and redo step c) ~ g) to override the method with the original one.


Note: We can use a kernel with multiple custom ACPI method running,
But each individual write to debugfs can implement a SINGLE
method override. i.e. if we want to insert/override multiple
ACPI methods, we need to redo step c) ~ g) for multiple times.
3 changes: 0 additions & 3 deletions trunk/Documentation/blackfin/00-INDEX
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00-INDEX
- This file

cache-lock.txt
- HOWTO for blackfin cache locking.

cachefeatures.txt
- Supported cache features.

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6 changes: 6 additions & 0 deletions trunk/Documentation/blackfin/Makefile
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obj-m := gptimers-example.o

all: modules

modules clean:
$(MAKE) -C ../.. SUBDIRS=$(PWD) $@
48 changes: 0 additions & 48 deletions trunk/Documentation/blackfin/cache-lock.txt

This file was deleted.

10 changes: 0 additions & 10 deletions trunk/Documentation/blackfin/cachefeatures.txt
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Expand Up @@ -41,16 +41,6 @@
icplb_flush();
dcplb_flush();

- Locking the cache.

cache_grab_lock();
cache_lock();

Please refer linux-2.6.x/Documentation/blackfin/cache-lock.txt for how to
lock the cache.

Locking the cache is optional feature.

- Miscellaneous cache functions.

flush_cache_all();
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