- 20 Oct, 2008 40 commits
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Krzysztof Helt authored
Change lock_kernel()/unlock_kernel() to local fb mutex. Each frame buffer instance has its own mutex. The one line try_to_load() function is unrolled to request_module() in two places for readability. [righi.andrea@gmail.com: fb: fix NULL pointer BUG dereference in fb_open()] Signed-off-by:
Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by:
Andrea Righi <righi.andrea@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Alan Cox authored
Framebuffer is heavily BKL dependant at the moment so just wrap the ioctl handler in the driver as we push down. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by:
Alan Cox <alan@redhat.com> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by:
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David Brownell authored
We can get the following oops from gpio_get_value_cansleep() when a GPIO controller doesn't provide a get() callback: Unable to handle kernel paging request for instruction fetch Faulting instruction address: 0x00000000 Oops: Kernel access of bad area, sig: 11 [#1] [...] NIP [00000000] 0x0 LR [c0182fb0] gpio_get_value_cansleep+0x40/0x50 Call Trace: [c7b79e80] [c0183f28] gpio_value_show+0x5c/0x94 [c7b79ea0] [c01a584c] dev_attr_show+0x30/0x7c [c7b79eb0] [c00d6b48] fill_read_buffer+0x68/0xe0 [c7b79ed0] [c00d6c54] sysfs_read_file+0x94/0xbc [c7b79ef0] [c008f24c] vfs_read+0xb4/0x16c [c7b79f10] [c008f580] sys_read+0x4c/0x90 [c7b79f40] [c0013a14] ret_from_syscall+0x0/0x38 It's OK to request the value of *any* GPIO; most GPIOs are bidirectional, so configuring them as outputs just enables an output driver and doesn't disable the input logic. So the problem is that gpio_get_value_cansleep() isn't making the same sanity check that gpio_get_value() does: making sure this GPIO isn't one of the atypical "no input logic" cases. Reported-by:
Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Cc: <stable@kernel.org> [2.6.27.x, 2.6.26.x, 2.6.25.x] Signed-off-by:
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Steven A. Falco authored
gpiolib can export GPIOs to userspace via sysfs. This patch modifies the gpio_value_show() so that any non-zero value is explicitly printed as "1", rather than whatever numerical value the lower-level driver returns. Signed-off-by:
Steve Falco <sfalco@harris.com> Signed-off-by:
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David Brownell authored
Teach rtc-cmos about the second bank of registers found on most modern x86 systems, giving access to 128 bytes more NVRAM. This version only sees that extra NVRAM when both register banks are provided as part of *one* PNP resource. Since BIOS on some systems presents them using two IO resources, and nothing merges them, this can't always show all the NVRAM. (We're supposed to be able to use PNP id PNP0b01 too, but BIOS tables doesn't often seem to use that particular option.) Signed-off-by:
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roel kluin authored
In function sn_sal_switch_to_asynch(): drivers/serial/sn_console.c:713: HZ * SN_SAL_UART_FIFO_DEPTH / SN_SAL_UART_FIFO_SPEED_CPS; After preprocessing (see defines in patch) this becomes HZ * 16 / 9600 / 10 (associativity from left to right), not equivalent to HZ * 16 / 960. Looks-obviously-right-to: Tony Luck <tony.luck@intel.com> Cc: Jes Sorensen <jes@sgi.com> Acked-by:
Pat Gefre <pfg@sgi.com> Signed-off-by:
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Adrian Bunk authored
This patch makes the needlessly global probe_serial_gsc() static. Signed-off-by:
Adrian Bunk <bunk@kernel.org> Signed-off-by:
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Jiri Slaby authored
readl/writel are not expected to accept iomap return value. Replace bogus mapping by standard ioremap. Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Cc: <R.E.Wolff@BitWizard.nl> Acked-by:
Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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Henrik Rydberg authored
The read fail ratio is sensitive to the delay between the first byte written and the first byte read; apparently the sensors cannot be rushed. Increasing the minimum wait time, without changing the total wait time, improves the fail ratio from a 8% chance that any of the sensors fails in one read, down to 0.4%, on a Macbook Air. On a Macbook Pro 3,1, the effect is even more apparent. By reducing the number of status polls, the ratio is further improved to below 0.1%. Finally, increasing the total wait time brings the fail ratio down to virtually zero. Signed-off-by:
Henrik Rydberg <rydberg@euromail.se> Tested-by:
Bob McElrath <bob@mcelrath.org> Cc: Nicolas Boichat <nicolas@boichat.ch> Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by:
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Henrik Rydberg authored
Add temperature sensor support for Macbook Pro 3. Signed-off-by:
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Henrik Rydberg authored
Adds temperature sensor support for the Macbook Pro 4. Signed-off-by:
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Andrew Morton authored
dmi_system_id.driver_data is already void*. Cc: Henrik Rydberg <rydberg@euromail.se> Cc: Nicolas Boichat <nicolas@boichat.ch> Cc: Riki Oktarianto <rkoktarianto@gmail.com> Cc: Mark M. Hoffman <mhoffman@lightlink.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by:
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Henrik Rydberg authored
This patch adds accelerometer, backlight and temperature sensor support for the Macbook Air. Signed-off-by:
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Henrik Rydberg authored
On some recent Macbooks, the package length for the light sensors ALV0 and ALV1 has changed from 6 to 10. This patch allows for a variable package length encompassing both variants. Signed-off-by:
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Henrik Rydberg authored
The time to wait for a status change while reading or writing to the SMC ports is a balance between read reliability and system performance. The current setting yields rougly three errors in a thousand when simultaneously reading three different temperature values on a Macbook Air. This patch increases the setting to a value yielding roughly one error in ten thousand, with no noticable system performance degradation. Signed-off-by:
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Henrik Rydberg authored
On many Macbooks since mid 2007, the Pro, C2D and Air models, applesmc fails to read some or all SMC ports. This problem has various effects, such as flooded logfiles, malfunctioning temperature sensors, accelerometers failing to initialize, and difficulties getting backlight functionality to work properly. The root of the problem seems to be the command protocol. The current code sends out a command byte, then repeatedly polls for an ack before continuing to send or recieve data. From experiments leading to this patch, it seems the command protocol never quite worked or changed so that one now sends a command byte, waits a little bit, polls for an ack, and if it fails, repeats the whole thing by sending the command byte again. This patch implements a send_command function according to the new interpretation of the protocol, and should work also for earlier models. Signed-off-by:
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Henrik Rydberg authored
At one single place in the code, the specified number of bytes to read and the actual number of bytes read differ by one. This one-liner patch fixes that inconsistency. Signed-off-by:
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Jim Cromie authored
Adds therm-min/max/crit-alarm callbacks, sensor-device-attribute declarations, and refs to those new decls in the macro used to initialize the therm_group (of sysfs files) The thermistors use voltage channels to measure; so they don't have a fault-alarm, but unlike the other voltages, they do have an overtemp, which we call crit (by convention). [akpm@linux-foundation.org: cleanup] Signed-off-by:
Jim Cromie <jim.cromie@gmail.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: "Mark M. Hoffman" <mhoffman@lightlink.com> Signed-off-by:
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Jim Cromie authored
temp and vin status register values may be set by chip specifications, set again by bios, or by this previously loaded driver. Debug output nicely displays modprobe init=\d actions. Signed-off-by:
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Jim Cromie authored
Driver handles 3 logical devices in fixed length array. Give this a define-d constant. Signed-off-by:
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Jim Cromie authored
Adds temp-min/max/crit/fault-alarm callbacks, sensor-device-attribute declarations, and refs to those new decls in the macro used to initialize the temp_group (of sysfs files) [akpm@linux-foundation.org: cleanups] Signed-off-by:
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Jim Cromie authored
Adds vin-min/max-alarm callbacks, sensor-device-attribute declarations, and refs to those new decls in the macro used to initialize the vin_group (of sysfs files) [akpm@linux-foundation.org: cleanups] Signed-off-by:
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Jim Cromie authored
Bring hwmon/pc87360 into agreement with Documentation/hwmon/sysfs-interface. Patchset adds separate limit alarms for voltages and temps, it also adds temp[123]_fault files. On my Soekris, temps 1,2 are unused/unconnected, so temp[123]_fault = 1,1,0 respectively. This agrees with /usr/bin/sensors, which has always shown them as OPEN. Temps 4,5,6 are thermistor based, and dont have a fault bit in their status register. This patch: 2 different kinds of constants added: - CHAN_ALM_* constants for (later) vin, temp alarm callbacks. - CHAN_* conversion constants, used in _init_device, partly for RW1C bits Signed-off-by:
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Ameya Palande authored
Fix for a typo and and replacing incorrect word in the comment. Signed-off-by:
Ameya Palande <2ameya@gmail.com> Cc: "Ashok Raj" <ashok.raj@intel.com> Cc: "Shaohua Li" <shaohua.li@intel.com> Cc: "Anil S Keshavamurthy" <anil.s.keshavamurthy@intel.com> Signed-off-by:
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WANG Cong authored
These comments are useless, remove them. Signed-off-by:
WANG Cong <wangcong@zeuux.org> Cc: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
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Eric Piel authored
On my HP 2510, pressing the (i) button generates an unknown keycode: 0x213b. So here is a patch adding support for it. However, as it seems there is already support for a similar button connected to 0x231b as keycode, I wonder if it could be a typo in the driver? Signed-off-by:
Eric Piel <eric.piel@tremplin-utc.net> Cc: Matthew Garrett <mjg@redhat.com> Signed-off-by:
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Andi Kleen authored
I fell into the trap recently that it only dumps hrtimers instead of all timers. Fix the documentation. Signed-off-by:
Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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WANG Cong authored
Fix arch/um/sys-i386/signal.c: In function 'copy_sc_from_user': arch/um/sys-i386/signal.c:182: warning: dereferencing 'void *' pointer arch/um/sys-i386/signal.c:182: error: request for member '_fxsr_env' in something not a structure or union Signed-off-by:
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Huang Weiyi authored
Removed duplicated include file <linux/smp_lock.h> in arch/m68k/bvme6000/rtc.c. Signed-off-by:
Huang Weiyi <weiyi.huang@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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Matt Helsley authored
Describe why we need the freezer subsystem and how to use it in a documentation file. Since the cgroups.txt file is focused on the subsystem-agnostic portions of cgroups make a directory and move the old cgroups.txt file at the same time. Signed-off-by:
Matt Helsley <matthltc@us.ibm.com> Cc: Paul Menage <menage@google.com> Cc: containers@lists.linux-foundation.org Signed-off-by:
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Matt Helsley authored
check_if_frozen() sounds like it should return something when in fact it's just updating the freezer state. Signed-off-by:
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Matt Helsley authored
Rename cgroup freezer states to be less generic to avoid any name collisions while also better describing what each state is. Signed-off-by:
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Matt Helsley authored
Don't let frozen tasks or cgroups change. This means frozen tasks can't leave their current cgroup for another cgroup. It also means that tasks cannot be added to or removed from a cgroup in the FROZEN state. We enforce these rules by checking for frozen tasks and cgroups in the can_attach() function. Signed-off-by:
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Matt Helsley authored
When a system is resumed after a suspend, it will also unfreeze frozen cgroups. This patchs modifies the resume sequence to skip the tasks which are part of a frozen control group. Signed-off-by:
Cedric Le Goater <clg@fr.ibm.com> Signed-off-by:
Serge E. Hallyn <serue@us.ibm.com> Tested-by:
Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by:
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Matt Helsley authored
This patch implements a new freezer subsystem in the control groups framework. It provides a way to stop and resume execution of all tasks in a cgroup by writing in the cgroup filesystem. The freezer subsystem in the container filesystem defines a file named freezer.state. Writing "FROZEN" to the state file will freeze all tasks in the cgroup. Subsequently writing "RUNNING" will unfreeze the tasks in the cgroup. Reading will return the current state. * Examples of usage : # mkdir /containers/freezer # mount -t cgroup -ofreezer freezer /containers # mkdir /containers/0 # echo $some_pid > /containers/0/tasks to get status of the freezer subsystem : # cat /containers/0/freezer.state RUNNING to freeze all tasks in the container : # echo FROZEN > /containers/0/freezer.state # cat /containers/0/freezer.state FREEZING # cat /containers/0/freezer.state FROZEN to unfreeze all tasks in the container : # echo RUNNING > /containers/0/freezer.state # cat /containers/0/freezer.state RUNNING This is the basic mechanism which should do the right thing for user space task in a simple scenario. It's important to note that freezing can be incomplete. In that case we return EBUSY. This means that some tasks in the cgroup are busy doing something that prevents us from completely freezing the cgroup at this time. After EBUSY, the cgroup will remain partially frozen -- reflected by freezer.state reporting "FREEZING" when read. The state will remain "FREEZING" until one of these things happens: 1) Userspace cancels the freezing operation by writing "RUNNING" to the freezer.state file 2) Userspace retries the freezing operation by writing "FROZEN" to the freezer.state file (writing "FREEZING" is not legal and returns EIO) 3) The tasks that blocked the cgroup from entering the "FROZEN" state disappear from the cgroup's set of tasks. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: export thaw_process] Signed-off-by:
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Matt Helsley authored
Now that the TIF_FREEZE flag is available in all architectures, extract the refrigerator() and freeze_task() from kernel/power/process.c and make it available to all. The refrigerator() can now be used in a control group subsystem implementing a control group freezer. Signed-off-by:
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Matt Helsley authored
This patch series introduces a cgroup subsystem that utilizes the swsusp freezer to freeze a group of tasks. It's immediately useful for batch job management scripts. It should also be useful in the future for implementing container checkpoint/restart. The freezer subsystem in the container filesystem defines a cgroup file named freezer.state. Reading freezer.state will return the current state of the cgroup. Writing "FROZEN" to the state file will freeze all tasks in the cgroup. Subsequently writing "RUNNING" will unfreeze the tasks in the cgroup. * Examples of usage : # mkdir /containers/freezer # mount -t cgroup -ofreezer freezer /containers # mkdir /containers/0 # echo $some_pid > /containers/0/tasks to get status of the freezer subsystem : # cat /containers/0/freezer.state RUNNING to freeze all tasks in the container : # echo FROZEN > /containers/0/freezer.state # cat /containers/0/freezer.state FREEZING # cat /containers/0/freezer.state FROZEN to unfreeze all tasks in the container : # echo RUNNING > /containers/0/freezer.state # cat /containers/0/freezer.state RUNNING This patch: The first step in making the refrigerator() available to all architectures, even for those without power management. The purpose of such a change is to be able to use the refrigerator() in a new control group subsystem which will implement a control group freezer. [akpm@linux-foundation.org: fix sparc] Signed-off-by:
Pavel Machek <pavel@suse.cz> Acked-by:
Nigel Cunningham <nigel@tuxonice.net> Tested-by:
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Brice Goglin authored
To prepare the chunking, move the sys_move_pages() code that is used when nodes!=NULL into do_pages_move(). And rename do_move_pages() into do_move_page_to_node_array(). Signed-off-by:
Brice Goglin <Brice.Goglin@inria.fr> Acked-by:
Christoph Lameter <cl@linux-foundation.org> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by:
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Brice Goglin authored
do_pages_stat() does not need any page_to_node entry for real. Just pass the pointers to the user-space page address array and to the user-space status array, and have do_pages_stat() traverse the former and fill the latter directly. Signed-off-by:
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Brice Goglin authored
A patchset reworking sys_move_pages(). It removes the possibly large vmalloc by using multiple chunks when migrating large buffers. It also dramatically increases the throughput for large buffers since the lookup in new_page_node() is now limited to a single chunk, causing the quadratic complexity to have a much slower impact. There is no need to use any radix-tree-like structure to improve this lookup. sys_move_pages() duration on a 4-quadcore-opteron 2347HE (1.9Gz), migrating between nodes #2 and #3: length move_pages (us) move_pages+patch (us) 4kB 126 98 40kB 198 168 400kB 963 937 4MB 12503 11930 40MB 246867 11848 Patches #1 and #4 are the important ones: 1) stop returning -ENOENT from sys_move_pages() if nothing got migrated 2) don't vmalloc a huge page_to_node array for do_pages_stat() 3) extract do_pages_move() out of sys_move_pages() 4) rework do_pages_move() to work on page_sized chunks 5) move_pages: no need to set pp->page to ZERO_PAGE(0) by default This patch: There is no point in returning -ENOENT from sys_move_pages() if all pages were already on the right node, while we return 0 if only 1 page was not. Most application don't know where their pages are allocated, so it's not an error to try to migrate them anyway. Just return 0 and let the status array in user-space be checked if the application needs details. It will make the upcoming chunked-move_pages() support much easier. Signed-off-by:
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