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authorIngo Molnar <mingo@elte.hu>2009-02-20 17:40:43 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-20 17:40:43 +0100
commit3b6f7b9beb553ea71a6d4d76ba82cf32eb6dadd2 (patch)
tree2cd8a8d61f350aa3b00e6b0afc998544923f183e /Documentation
parent9be1b56a3e718aa998772019c57c398dbb19e258 (diff)
parent07a66d7c53a538e1a9759954a82bb6c07365eff9 (diff)
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Merge branch 'x86/urgent' into x86/core
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-firmware-memmap2
-rw-r--r--Documentation/PCI/PCIEBUS-HOWTO.txt2
-rw-r--r--Documentation/cgroups/cgroups.txt6
-rw-r--r--Documentation/hwmon/hpfall.c101
-rw-r--r--Documentation/hwmon/lis3lv02d8
-rw-r--r--Documentation/tracers/mmiotrace.txt6
6 files changed, 115 insertions, 10 deletions
diff --git a/Documentation/ABI/testing/sysfs-firmware-memmap b/Documentation/ABI/testing/sysfs-firmware-memmap
index 0d99ee6ae02..eca0d65087d 100644
--- a/Documentation/ABI/testing/sysfs-firmware-memmap
+++ b/Documentation/ABI/testing/sysfs-firmware-memmap
@@ -1,6 +1,6 @@
What: /sys/firmware/memmap/
Date: June 2008
-Contact: Bernhard Walle <bwalle@suse.de>
+Contact: Bernhard Walle <bernhard.walle@gmx.de>
Description:
On all platforms, the firmware provides a memory map which the
kernel reads. The resources from that memory map are registered
diff --git a/Documentation/PCI/PCIEBUS-HOWTO.txt b/Documentation/PCI/PCIEBUS-HOWTO.txt
index 9a07e38631b..6bd5f372ade 100644
--- a/Documentation/PCI/PCIEBUS-HOWTO.txt
+++ b/Documentation/PCI/PCIEBUS-HOWTO.txt
@@ -93,7 +93,7 @@ the PCI Express Port Bus driver from loading a service driver.
int pcie_port_service_register(struct pcie_port_service_driver *new)
-This API replaces the Linux Driver Model's pci_module_init API. A
+This API replaces the Linux Driver Model's pci_register_driver API. A
service driver should always calls pcie_port_service_register at
module init. Note that after service driver being loaded, calls
such as pci_enable_device(dev) and pci_set_master(dev) are no longer
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index d9e5d6f41b9..93feb844448 100644
--- a/Documentation/cgroups/cgroups.txt
+++ b/Documentation/cgroups/cgroups.txt
@@ -252,10 +252,8 @@ cgroup file system directories.
When a task is moved from one cgroup to another, it gets a new
css_set pointer - if there's an already existing css_set with the
desired collection of cgroups then that group is reused, else a new
-css_set is allocated. Note that the current implementation uses a
-linear search to locate an appropriate existing css_set, so isn't
-very efficient. A future version will use a hash table for better
-performance.
+css_set is allocated. The appropriate existing css_set is located by
+looking into a hash table.
To allow access from a cgroup to the css_sets (and hence tasks)
that comprise it, a set of cg_cgroup_link objects form a lattice;
diff --git a/Documentation/hwmon/hpfall.c b/Documentation/hwmon/hpfall.c
new file mode 100644
index 00000000000..bbea1ccfd46
--- /dev/null
+++ b/Documentation/hwmon/hpfall.c
@@ -0,0 +1,101 @@
+/* Disk protection for HP machines.
+ *
+ * Copyright 2008 Eric Piel
+ * Copyright 2009 Pavel Machek <pavel@suse.cz>
+ *
+ * GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+#include <signal.h>
+
+void write_int(char *path, int i)
+{
+ char buf[1024];
+ int fd = open(path, O_RDWR);
+ if (fd < 0) {
+ perror("open");
+ exit(1);
+ }
+ sprintf(buf, "%d", i);
+ if (write(fd, buf, strlen(buf)) != strlen(buf)) {
+ perror("write");
+ exit(1);
+ }
+ close(fd);
+}
+
+void set_led(int on)
+{
+ write_int("/sys/class/leds/hp::hddprotect/brightness", on);
+}
+
+void protect(int seconds)
+{
+ write_int("/sys/block/sda/device/unload_heads", seconds*1000);
+}
+
+int on_ac(void)
+{
+// /sys/class/power_supply/AC0/online
+}
+
+int lid_open(void)
+{
+// /proc/acpi/button/lid/LID/state
+}
+
+void ignore_me(void)
+{
+ protect(0);
+ set_led(0);
+
+}
+
+int main(int argc, char* argv[])
+{
+ int fd, ret;
+
+ fd = open("/dev/freefall", O_RDONLY);
+ if (fd < 0) {
+ perror("open");
+ return EXIT_FAILURE;
+ }
+
+ signal(SIGALRM, ignore_me);
+
+ for (;;) {
+ unsigned char count;
+
+ ret = read(fd, &count, sizeof(count));
+ alarm(0);
+ if ((ret == -1) && (errno == EINTR)) {
+ /* Alarm expired, time to unpark the heads */
+ continue;
+ }
+
+ if (ret != sizeof(count)) {
+ perror("read");
+ break;
+ }
+
+ protect(21);
+ set_led(1);
+ if (1 || on_ac() || lid_open()) {
+ alarm(2);
+ } else {
+ alarm(20);
+ }
+ }
+
+ close(fd);
+ return EXIT_SUCCESS;
+}
diff --git a/Documentation/hwmon/lis3lv02d b/Documentation/hwmon/lis3lv02d
index 0fcfc4a7ccd..287f8c90265 100644
--- a/Documentation/hwmon/lis3lv02d
+++ b/Documentation/hwmon/lis3lv02d
@@ -33,6 +33,14 @@ rate - reports the sampling rate of the accelerometer device in HZ
This driver also provides an absolute input class device, allowing
the laptop to act as a pinball machine-esque joystick.
+Another feature of the driver is misc device called "freefall" that
+acts similar to /dev/rtc and reacts on free-fall interrupts received
+from the device. It supports blocking operations, poll/select and
+fasync operation modes. You must read 1 bytes from the device. The
+result is number of free-fall interrupts since the last successful
+read (or 255 if number of interrupts would not fit).
+
+
Axes orientation
----------------
diff --git a/Documentation/tracers/mmiotrace.txt b/Documentation/tracers/mmiotrace.txt
index cde23b4a12a..5731c67abc5 100644
--- a/Documentation/tracers/mmiotrace.txt
+++ b/Documentation/tracers/mmiotrace.txt
@@ -78,12 +78,10 @@ to view your kernel log and look for "mmiotrace has lost events" warning. If
events were lost, the trace is incomplete. You should enlarge the buffers and
try again. Buffers are enlarged by first seeing how large the current buffers
are:
-$ cat /debug/tracing/trace_entries
+$ cat /debug/tracing/buffer_size_kb
gives you a number. Approximately double this number and write it back, for
instance:
-$ echo 0 > /debug/tracing/tracing_enabled
-$ echo 128000 > /debug/tracing/trace_entries
-$ echo 1 > /debug/tracing/tracing_enabled
+$ echo 128000 > /debug/tracing/buffer_size_kb
Then start again from the top.
If you are doing a trace for a driver project, e.g. Nouveau, you should also