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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-10-09 16:33:05 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-10-09 16:33:05 -0400
commitc97f68145e8067b3ac4b126a6faebf90f9ffc302 (patch)
treeeb2060681552a00e9efa98224b95f69a3dc84390 /Documentation
parentb1add0480a95b6ceaece5caf6c50614771eae9b2 (diff)
parent7bff3c4ce44ea48f50dc47a5994454984bd08c59 (diff)
Merge branch 'for-rmk' of git://source.mvista.com/git/linux-davinci-2.6.git
Merge branch 'davinci' into devel
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-gpio26
-rw-r--r--Documentation/cpusets.txt18
-rw-r--r--Documentation/feature-removal-schedule.txt8
-rw-r--r--Documentation/filesystems/proc.txt2
4 files changed, 46 insertions, 8 deletions
diff --git a/Documentation/ABI/testing/sysfs-gpio b/Documentation/ABI/testing/sysfs-gpio
new file mode 100644
index 00000000000..8aab8092ad3
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-gpio
@@ -0,0 +1,26 @@
1What: /sys/class/gpio/
2Date: July 2008
3KernelVersion: 2.6.27
4Contact: David Brownell <dbrownell@users.sourceforge.net>
5Description:
6
7 As a Kconfig option, individual GPIO signals may be accessed from
8 userspace. GPIOs are only made available to userspace by an explicit
9 "export" operation. If a given GPIO is not claimed for use by
10 kernel code, it may be exported by userspace (and unexported later).
11 Kernel code may export it for complete or partial access.
12
13 GPIOs are identified as they are inside the kernel, using integers in
14 the range 0..INT_MAX. See Documentation/gpio.txt for more information.
15
16 /sys/class/gpio
17 /export ... asks the kernel to export a GPIO to userspace
18 /unexport ... to return a GPIO to the kernel
19 /gpioN ... for each exported GPIO #N
20 /value ... always readable, writes fail for input GPIOs
21 /direction ... r/w as: in, out (default low); write: high, low
22 /gpiochipN ... for each gpiochip; #N is its first GPIO
23 /base ... (r/o) same as N
24 /label ... (r/o) descriptive, not necessarily unique
25 /ngpio ... (r/o) number of GPIOs; numbered N to N + (ngpio - 1)
26
diff --git a/Documentation/cpusets.txt b/Documentation/cpusets.txt
index 1f5a924d1e5..47e568a9370 100644
--- a/Documentation/cpusets.txt
+++ b/Documentation/cpusets.txt
@@ -635,14 +635,16 @@ prior 'mems' setting, will not be moved.
635 635
636There is an exception to the above. If hotplug functionality is used 636There is an exception to the above. If hotplug functionality is used
637to remove all the CPUs that are currently assigned to a cpuset, 637to remove all the CPUs that are currently assigned to a cpuset,
638then the kernel will automatically update the cpus_allowed of all 638then all the tasks in that cpuset will be moved to the nearest ancestor
639tasks attached to CPUs in that cpuset to allow all CPUs. When memory 639with non-empty cpus. But the moving of some (or all) tasks might fail if
640hotplug functionality for removing Memory Nodes is available, a 640cpuset is bound with another cgroup subsystem which has some restrictions
641similar exception is expected to apply there as well. In general, 641on task attaching. In this failing case, those tasks will stay
642the kernel prefers to violate cpuset placement, over starving a task 642in the original cpuset, and the kernel will automatically update
643that has had all its allowed CPUs or Memory Nodes taken offline. User 643their cpus_allowed to allow all online CPUs. When memory hotplug
644code should reconfigure cpusets to only refer to online CPUs and Memory 644functionality for removing Memory Nodes is available, a similar exception
645Nodes when using hotplug to add or remove such resources. 645is expected to apply there as well. In general, the kernel prefers to
646violate cpuset placement, over starving a task that has had all
647its allowed CPUs or Memory Nodes taken offline.
646 648
647There is a second exception to the above. GFP_ATOMIC requests are 649There is a second exception to the above. GFP_ATOMIC requests are
648kernel internal allocations that must be satisfied, immediately. 650kernel internal allocations that must be satisfied, immediately.
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index eb1a47b9742..83c88cae1ed 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -322,3 +322,11 @@ Why: Accounting can now be enabled/disabled without kernel recompilation.
322 controlled by a kernel/module/sysfs/sysctl parameter. 322 controlled by a kernel/module/sysfs/sysctl parameter.
323Who: Krzysztof Piotr Oledzki <ole@ans.pl> 323Who: Krzysztof Piotr Oledzki <ole@ans.pl>
324 324
325---------------------------
326
327What: ide-scsi (BLK_DEV_IDESCSI)
328When: 2.6.29
329Why: The 2.6 kernel supports direct writing to ide CD drives, which
330 eliminates the need for ide-scsi. The new method is more
331 efficient in every way.
332Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 394eb2cc1c3..f566ad9bcb7 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -2413,6 +2413,8 @@ The following 4 memory types are supported:
2413 - (bit 1) anonymous shared memory 2413 - (bit 1) anonymous shared memory
2414 - (bit 2) file-backed private memory 2414 - (bit 2) file-backed private memory
2415 - (bit 3) file-backed shared memory 2415 - (bit 3) file-backed shared memory
2416 - (bit 4) ELF header pages in file-backed private memory areas (it is
2417 effective only if the bit 2 is cleared)
2416 2418
2417 Note that MMIO pages such as frame buffer are never dumped and vDSO pages 2419 Note that MMIO pages such as frame buffer are never dumped and vDSO pages
2418 are always dumped regardless of the bitmask status. 2420 are always dumped regardless of the bitmask status.