- 10 Aug, 2010 40 commits
-
-
Michel Lespinasse authored
This change addresses the following situation: - Thread A acquires the rwsem for read - Thread B tries to acquire the rwsem for write, notices there is already an active owner for the rwsem. - Thread C tries to acquire the rwsem for read, notices that thread B already tried to acquire it. - Thread C grabs the spinlock and queues itself on the wait queue. - Thread B grabs the spinlock and queues itself behind C. At this point A is the only remaining active owner on the rwsem. In this situation thread B could notice that it was the last active writer on the rwsem, and decide to wake C to let it proceed in parallel with A since they both only want the rwsem for read. Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: David Howells <dhowells@redhat.com> Cc: Mike Waychison <mikew@google.com> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Ying Han <yinghan@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Michel Lespinasse authored
Previously each waiting thread added a bias of RWSEM_WAITING_BIAS. With this change, the bias is added only once to indicate that the wait list is non-empty. This has a few nice properties which will be used in following changes: - when the spinlock is held and the waiter list is known to be non-empty, count < RWSEM_WAITING_BIAS <=> there is an active writer on that sem - count == RWSEM_WAITING_BIAS <=> there are waiting threads and no active readers/writers on that sem Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: David Howells <dhowells@redhat.com> Cc: Mike Waychison <mikew@google.com> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Ying Han <yinghan@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Michel Lespinasse authored
In __rwsem_do_wake(), we can skip the active count check unless we come there from up_xxxx(). Also when checking the active count, it is not actually necessary to increment it; this allows us to get rid of the read side undo code and simplify the calculation of the final rwsem count adjustment once we've counted the reader threads to wake. The basic observation is the following. When there are waiter threads on a rwsem and the spinlock is held, other threads can only increment the active count by trying to grab the rwsem in down_xxxx(). However down_xxxx() will notice there are waiter threads and take the down_failed path, blocking to acquire the spinlock on the way there. Therefore, a thread observing an active count of zero with waiters queued and the spinlock held, is protected against other threads acquiring the rwsem until it wakes the last waiter or releases the spinlock. Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: David Howells <dhowells@redhat.com> Cc: Mike Waychison <mikew@google.com> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Ying Han <yinghan@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Michel Lespinasse authored
This is in preparation for later changes in the series. In __rwsem_do_wake(), the first queued waiter is checked first in order to determine whether it's a writer or a reader. The code paths diverge at this point. The code that checks and increments the rwsem active count is duplicated on both sides - the point is that later changes in the series will be able to independently modify both sides. Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: David Howells <dhowells@redhat.com> Cc: Mike Waychison <mikew@google.com> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Ying Han <yinghan@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Giel van Schijndel authored
Allow device probing to recognise the Fintek F71808E. Sysfs interface: * Fan/pwm control is the same as for F71889FG * Temperature and voltage sensor handling is largely the same as for the F71889FG - Has one temperature sensor less (doesn't have temp3) - Misses one voltage sensor (doesn't have V6, thus in6_input refers to what in7_input refers for F71889FG) For the purpose of the sysfs interface fxxxx_in_temp_attr[] is split up such that it can largely be reused. Signed-off-by: Giel van Schijndel <me@mortis.eu> Cc: Jean Delvare <khali@linux-fr.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Andrew Morton authored
register_hotcpu_notifier() is designed to make these ifdefs unnecessary. Cc: Chen Gong <gong.chen@linux.intel.com> Cc: Rudolf Marek <r.marek@assembler.cz> Cc: Huaxu Wan <huaxu.wan@intel.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Chen Gong authored
Update coretemp supported CPU TjMax lists and some cleanup work. Signed-off-by: Chen Gong <gong.chen@linux.intel.com> Cc: Rudolf Marek <r.marek@assembler.cz> Cc: Huaxu Wan <huaxu.wan@intel.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Chen Gong authored
If one coretemp device can't be added, it should allow subsequent adding operation because every new-added device will create a new sysfs group, not an additional sensor sys entry. Signed-off-by: Chen Gong <gong.chen@linux.intel.com> Cc: Rudolf Marek <r.marek@assembler.cz> Cc: Huaxu Wan <huaxu.wan@intel.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Chen Gong authored
Fix two errors in hotplug. One is for hotplug notifier. The other is unnecessary driver unregister. Because even none of online cpus supports coretemp, we can't assume new onlined cpu doesn't support it either. If related driver is unregistered there we have no chance to use coretemp from then on. Signed-off-by: Chen Gong <gong.chen@linux.intel.com> Cc: Rudolf Marek <r.marek@assembler.cz> Cc: Huaxu Wan <huaxu.wan@intel.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Guenter Roeck authored
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Guenter Roeck authored
This driver adds support for the monitoring features of the Summit Microelectronics SMM665 Six-Channel Active DC Output Controller/Monitor. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Cc: Jean Delvare <khali@linux-fr.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Kalhan Trisal authored
This driver will report the heading values in degrees to the sysfs interface. The values returned are headings . e.g. 245.6 Alan: Cleanups requested now all folded in and a sysfs description to keep Andrew happy. The sysfs description now resembles hwmon. Signed-off-by: Kalhan Trisal <kalhan.trisal@intel.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Ritesh Raj Sarraf authored
Add Lenovo Thinkpad T400. I have done the testing on my laptop. The hdaps module detects the device and the hdapsd daemon is able to [un]park the disk. Signed-off-by: Ritesh Raj Sarraf <rrs@debian.org> Cc: Frank Seidel <frank@f-seidel.de> Cc: Dmitry Torokhov <dtor@mail.ru> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Patrick Pannuto authored
These are caused by checkpatch incorrectly parsing its internal representation of a statement block for struct's (or anything else that is a statement block encapsulated in {}'s that also ends with a ';'). Fix this by properly parsing a statement block. An example: +struct dummy_type dummy = { + .foo = "baz", +}; +EXPORT_SYMBOL_GPL(dummy); + +static int dummy_func(void) +{ + return -EDUMMYCODE; +} +EXPORT_SYMBOL_GPL(dummy_func); WARNING: EXPORT_SYMBOL(foo); should immediately \ follow its function/variable #19: FILE: dummy.c:4: +EXPORT_SYMBOL_GPL(dummy); The above warning is issued when it should not be. Signed-off-by: Patrick Pannuto <ppannuto@codeaurora.org> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Patrick Pannuto authored
As explained in Documentation/timers/timers-howto.txt, msleep's of < 20ms may sleep for as long as 20ms. Caller's of msleep(1) or msleep(2), etc are likely not to expect this quirky behavior - warn them. Signed-off-by: Patrick Pannuto <ppannuto@codeaurora.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Patrick Pannuto authored
When possible, sleeping is (usually) better than delaying; however, don't bother callers of udelay < 10us, as those cases are generally not worth the switch to usleep [akpm@linux-foundation.org: fix mismatched parentheses] Signed-off-by: Patrick Pannuto <ppannuto@codeaurora.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Add new logging functions netdev_<level> and netif_<level>. Don't complain if the only thing on a line is a quoted string. Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Eloff authored
Make error message say 'ERROR: do not initialise globals to 0 or NULL' rather than 'ERROR: do not initialise externals to 0 or NULL'. Makes more sense in the context since there is an extern keyword in C and that is a global declaration within the scope of the current file. Signed-off-by: Joe Eloff <kagen101@gmail.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Raffaele Recalcati authored
I've got a false positive when spaces are present at the beginning of a line. So I add this check, obviously excluding to check the lines in the middle of comments. For instance this code passes the checkpatch test: +struct davinci_mcbsp_data { + unsigned int fmt; + int clk_div; +}; + +static struct davinci_mcbsp_data mcbsp_data; Where, before the string "int clk_div", I have 4 spaces (\040 ascii character). With v2.6.34 scripts/checkpatch.pl script I get: scripts/checkpatch.pl 0001-ASoC-DaVinci-Added-support-for-stereo-I2S.patch total: 0 errors, 0 warnings, 201 lines checked 0001-ASoC-DaVinci-Added-support-for-stereo-I2S.patch has no obvious style problems and is ready for submission. That is not correct. Instead with the proposed patch I get: scripts/checkpatch.pl 0001-ASoC-DaVinci-Added-support-for-stereo-I2S.patch WARNING: please, no space for starting a line, excluding comments #63: FILE: sound/soc/davinci/davinci-i2s.c:165: + int clk_div;$ WARNING: please, no space for starting a line, excluding comments #95: FILE: sound/soc/davinci/davinci-i2s.c:406: + return 0;$ total: 0 errors, 2 warnings, 201 lines checked That is correct. Signed-off-by: Raffaele Recalcati <raffaele.recalcati@bticino.it> Cc: Wolfram Sang <w.sang@pengutronix.de> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Wolfram Sang authored
Change the check suggesting replacement of asm-includes with linux-includes. Exceptions to this rule are easier to extend now. Add memory.h because ARM has a custom one. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Axel Lin authored
The error may happen at any iteration of the for loop, this patch properly unregisters already registed edd_devices in error path. [akpm@linux-foundation.org: remove unneeded NULL test] Signed-off-by: Axel Lin <axel.lin@gmail.com> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Eric Paris authored
Getting and putting arrays of pointers with flex arrays is a PITA. You have to remember to pass &ptr to the _put and you have to do weird and wacky casting to get the ptr back from the _get. Add two functions flex_array_get_ptr() and flex_array_put_ptr() to handle all of the magic. [akpm@linux-foundation.org: simplification suggested by Joe] Signed-off-by: Eric Paris <eparis@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Joe Perches <joe@perches.com> Cc: James Morris <jmorris@namei.org> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Michal Nazarewicz authored
The strict_strtoul() and strict_strtoull() functions used strlen() to check argument's length in a situation where it wasn't strictly necessary Signed-off-by: Michal Nazarewicz <mina86@mina86.com> Cc: "Yi Yang" <yi.y.yang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Baruch Siach authored
Use the magic LIST_POISON* values to detect an incorrect use of list_del on a deleted entry. This DEBUG_LIST specific warning is easier to understand than the generic Oops message caused by LIST_POISON dereference. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
This old address bounces and Sergey doesn't answer at another email address. Signed-off-by: Joe Perches <joe@perches.com> Cc: Sergey Kostyliov <rathamahata@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Laurent is sending auto-replies with a new email address, so might as well update MAINTAINERS. Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Subrata Modak authored
Signed-off-by: Subrata Modak <subrata@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Cc: Jim Paris <jim@jtan.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Cc: Felipe Balbi <felipe.balbi@nokia.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Cc: Vitaly Bordug <vitb@kernel.crashing.org> Cc: Marcelo Tosatti <marcelo@kvack.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Cc: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Cc: David Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Commit f80a3f62 ("Staging: strip: delete the driver") removed it. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Signed-off-by: Joe Perches <joe@perches.com> Cc: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Commit d6e976c0 ("UIO: Remove SMX Cryptengine driver") removed the file. Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Ben Nizette <bn@niasdigital.com> Acked-by: Hans J. Koch <hjk@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-
Joe Perches authored
Entered as 822 (10 key typo?). Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-