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* cpuidle: consolidate 2.6.22 cpuidle branch into one patchLen Brown2007-10-10
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Signed-off-by: Len Brown <len.brown@intel.com> commit 889172fc915f5a7fe20f35b133cbd205ce69bf6c Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Thu Sep 13 13:40:05 2007 -0700 cpuidle: Retain old ACPI policy for !CONFIG_CPU_IDLE Retain the old policy in processor_idle, so that when CPU_IDLE is not configured, old C-state policy will still be used. This provides a clean gradual migration path from old ACPI policy to new cpuidle based policy. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 9544a8181edc7ecc33b3bfd69271571f98ed08bc Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Thu Sep 13 13:39:17 2007 -0700 cpuidle: Configure governors by default Quoting Len "Do not give an option to users to shoot themselves in the foot". Remove the configurability of ladder and menu governors as they are needed for default policy of cpuidle. That way users will not be able to have cpuidle without any policy loosing all C-state power savings. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 8975059a2c1e56cfe83d1bcf031bcf4cb39be743 Author: Adam Belay <abelay@novell.com> Date: Tue Aug 21 18:27:07 2007 -0400 CPUIDLE: load ACPI properly when CPUIDLE is disabled Change the registration return codes for when CPUIDLE support is not compiled into the kernel. As a result, the ACPI processor driver will load properly even if CPUIDLE is unavailable. However, it may be possible to cleanup the ACPI processor driver further and eliminate some dead code paths. Signed-off-by: Adam Belay <abelay@novell.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit e0322e2b58dd1b12ec669bf84693efe0dc2414a8 Author: Adam Belay <abelay@novell.com> Date: Tue Aug 21 18:26:06 2007 -0400 CPUIDLE: remove cpuidle_get_bm_activity() Remove cpuidle_get_bm_activity() and updates governors accordingly. Signed-off-by: Adam Belay <abelay@novell.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 18a6e770d5c82ba26653e53d240caa617e09e9ab Author: Adam Belay <abelay@novell.com> Date: Tue Aug 21 18:25:58 2007 -0400 CPUIDLE: max_cstate fix Currently max_cstate is limited to 0, resulting in no idle processor power management on ACPI platforms. This patch restores the value to the array size. Signed-off-by: Adam Belay <abelay@novell.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 1fdc0887286179b40ce24bcdbde663172e205ef0 Author: Adam Belay <abelay@novell.com> Date: Tue Aug 21 18:25:40 2007 -0400 CPUIDLE: handle BM detection inside the ACPI Processor driver Update the ACPI processor driver to detect BM activity and limit state entry depth internally, rather than exposing such requirements to CPUIDLE. As a result, CPUIDLE can drop this ACPI-specific interface and become more platform independent. BM activity is now handled much more aggressively than it was in the original implementation, so some testing coverage may be needed to verify that this doesn't introduce any DMA buffer under-run issues. Signed-off-by: Adam Belay <abelay@novell.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 0ef38840db666f48e3cdd2b769da676c57228dd9 Author: Adam Belay <abelay@novell.com> Date: Tue Aug 21 18:25:14 2007 -0400 CPUIDLE: menu governor updates Tweak the menu governor to more effectively handle non-timer break events. Non-timer break events are detected by comparing the actual sleep time to the expected sleep time. In future revisions, it may be more reliable to use the timer data structures directly. Signed-off-by: Adam Belay <abelay@novell.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit bb4d74fca63fa96cf3ace644b15ae0f12b7df5a1 Author: Adam Belay <abelay@novell.com> Date: Tue Aug 21 18:24:40 2007 -0400 CPUIDLE: fix 'current_governor' sysfs entry Allow the "current_governor" sysfs entry to properly handle input terminated with '\n'. Signed-off-by: Adam Belay <abelay@novell.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit df3c71559bb69b125f1a48971bf0d17f78bbdf47 Author: Len Brown <len.brown@intel.com> Date: Sun Aug 12 02:00:45 2007 -0400 cpuidle: fix IA64 build (again) Signed-off-by: Len Brown <len.brown@intel.com> commit a02064579e3f9530fd31baae16b1fc46b5a7bca8 Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Date: Sun Aug 12 01:39:27 2007 -0400 cpuidle: Remove support for runtime changing of max_cstate Remove support for runtime changeability of max_cstate. Drivers can use use latency APIs. max_cstate can still be used as a boot time option and dmi override. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 0912a44b13adf22f5e3f607d263aed23b4910d7e Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Date: Sun Aug 12 01:39:16 2007 -0400 cpuidle: Remove ACPI cstate_limit calls from ipw2100 ipw2100 already has code to use accetable_latency interfaces to limit the C-state. Remove the calls to acpi_set_cstate_limit and acpi_get_cstate_limit as they are redundant. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit c649a76e76be6bff1fd770d0a775798813a3f6e0 Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Date: Sun Aug 12 01:35:39 2007 -0400 cpuidle: compile fix for pause and resume functions Fix the compilation failure when cpuidle is not compiled in. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Acked-by: Adam Belay <adam.belay@novell.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 2305a5920fb8ee6ccec1c62ade05aa8351091d71 Author: Adam Belay <abelay@novell.com> Date: Thu Jul 19 00:49:00 2007 -0400 cpuidle: re-write Some portions have been rewritten to make the code cleaner and lighter weight. The following is a list of changes: 1.) the state name is now included in the sysfs interface 2.) detection, hotplug, and available state modifications are handled by CPUIDLE drivers directly 3.) the CPUIDLE idle handler is only ever installed when at least one cpuidle_device is enabled and ready 4.) the menu governor BM code no longer overflows 5.) the sysfs attributes are now printed as unsigned integers, avoiding negative values 6.) a variety of other small cleanups Also, Idle drivers are no longer swappable during runtime through the CPUIDLE sysfs inteface. On i386 and x86_64 most idle handlers (e.g. poll, mwait, halt, etc.) don't benefit from an infrastructure that supports multiple states, so I think using a more general case idle handler selection mechanism would be cleaner. Signed-off-by: Adam Belay <abelay@novell.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Acked-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit df25b6b56955714e6e24b574d88d1fd11f0c3ee5 Author: Len Brown <len.brown@intel.com> Date: Tue Jul 24 17:08:21 2007 -0400 cpuidle: fix IA64 buid Signed-off-by: Len Brown <len.brown@intel.com> commit fd6ada4c14488755ff7068860078c437431fbccd Author: Adrian Bunk <bunk@stusta.de> Date: Mon Jul 9 11:33:13 2007 -0700 cpuidle: static make cpuidle_replace_governor() static Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit c1d4a2cebcadf2429c0c72e1d29aa2a9684c32e0 Author: Adrian Bunk <bunk@stusta.de> Date: Tue Jul 3 00:54:40 2007 -0400 cpuidle: static This patch makes the needlessly global struct menu_governor static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit dbf8780c6e8d572c2c273da97ed1cca7608fd999 Author: Andrew Morton <akpm@linux-foundation.org> Date: Tue Jul 3 00:49:14 2007 -0400 export symbol tick_nohz_get_sleep_length ERROR: "tick_nohz_get_sleep_length" [drivers/cpuidle/governors/menu.ko] undefined! ERROR: "tick_nohz_get_idle_jiffies" [drivers/cpuidle/governors/menu.ko] undefined! And please be sure to get your changes to core kernel suitably reviewed. Cc: Adam Belay <abelay@novell.com> Cc: Venki Pallipadi <venkatesh.pallipadi@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 29f0e248e7017be15f99febf9143a2cef00b2961 Author: Andrew Morton <akpm@linux-foundation.org> Date: Tue Jul 3 00:43:04 2007 -0400 tick.h needs hrtimer.h It uses hrtimers. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit e40cede7d63a029e92712a3fe02faee60cc38fb4 Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Tue Jul 3 00:40:34 2007 -0400 cpuidle: first round of documentation updates Documentation changes based on Pavel's feedback. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 83b42be2efece386976507555c29e7773a0dfcd1 Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Tue Jul 3 00:39:25 2007 -0400 cpuidle: add rating to the governors and pick the one with highest rating by default Introduce a governor rating scheme to pick the right governor by default. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit d2a74b8c5e8f22def4709330d4bfc4a29209b71c Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Tue Jul 3 00:38:08 2007 -0400 cpuidle: make cpuidle sysfs driver governor switch off by default Make default cpuidle sysfs to show current_governor and current_driver in read-only mode. More elaborate available_governors and available_drivers with writeable current_governor and current_driver interface only appear with "cpuidle_sysfs_switch" boot parameter. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 1f60a0e80bf83cf6b55c8845bbe5596ed8f6307b Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Tue Jul 3 00:37:00 2007 -0400 cpuidle: menu governor: change the early break condition Change the C-state early break out algorithm in menu governor. We only look at early breakouts that result in wakeups shorter than idle state's target_residency. If such a breakout is frequent enough, eliminate the particular idle state upto a timeout period. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 45a42095cf64b003b4a69be3ce7f434f97d7af51 Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Tue Jul 3 00:35:38 2007 -0400 cpuidle: fix uninitialized variable in sysfs routine Fix the uninitialized usage of ret. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 80dca7cdba3e6ee13eae277660873ab9584eb3be Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Tue Jul 3 00:34:16 2007 -0400 cpuidle: reenable /proc/acpi//power interface for the time being Keep /proc/acpi/processor/CPU*/power around for a while as powertop depends on it. It will be marked deprecated and removed in future. powertop can use cpuidle interfaces instead. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 589c37c2646c5e3813a51255a5ee1159cb4c33fc Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Tue Jul 3 00:32:37 2007 -0400 cpuidle: menu governor and hrtimer compile fix Compile fix for menu governor. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 0ba80bd9ab3ed304cb4f19b722e4cc6740588b5e Author: Len Brown <len.brown@intel.com> Date: Thu May 31 22:51:43 2007 -0400 cpuidle: build fix - cpuidle vs ipw2100 module ERROR: "acpi_set_cstate_limit" [drivers/net/wireless/ipw2100.ko] undefined! Signed-off-by: Len Brown <len.brown@intel.com> commit d7d8fa7f96a7f7682be7c6cc0cc53fa7a18c3b58 Author: Adam Belay <abelay@novell.com> Date: Sat Mar 24 03:47:07 2007 -0400 cpuidle: add the 'menu' governor Here is my first take at implementing an idle PM governor that takes full advantage of NO_HZ. I call it the 'menu' governor because it considers the full list of idle states before each entry. I've kept the implementation fairly simple. It attempts to guess the next residency time and then chooses a state that would meet at least the break-even point between power savings and entry cost. To this end, it selects the deepest idle state that satisfies the following constraints: 1. If the idle time elapsed since bus master activity was detected is below a threshold (currently 20 ms), then limit the selection to C2-type or above. 2. Do not choose a state with a break-even residency that exceeds the expected time remaining until the next timer interrupt. 3. Do not choose a state with a break-even residency that exceeds the elapsed time between the last pair of break events, excluding timer interrupts. This governor has an advantage over "ladder" governor because it proactively checks how much time remains until the next timer interrupt using the tick infrastructure. Also, it handles device interrupt activity more intelligently by not including timer interrupts in break event calculations. Finally, it doesn't make policy decisions using the number of state entries, which can have variable residency times (NO_HZ makes these potentially very large), and instead only considers sleep time deltas. The menu governor can be selected during runtime using the cpuidle sysfs interface like so: "echo "menu" > /sys/devices/system/cpu/cpuidle/current_governor" Signed-off-by: Adam Belay <abelay@novell.com> Signed-off-by: Len Brown <len.brown@intel.com> commit a4bec7e65aa3b7488b879d971651cc99a6c410fe Author: Adam Belay <abelay@novell.com> Date: Sat Mar 24 03:47:03 2007 -0400 cpuidle: export time until next timer interrupt using NO_HZ Expose information about the time remaining until the next timer interrupt expires by utilizing the dynticks infrastructure. Also modify the main idle loop to allow dynticks to handle non-interrupt break events (e.g. DMA). Finally, expose sleep ticks information to external code. Thomas Gleixner is responsible for much of the code in this patch. However, I've made some additional changes, so I'm probably responsible if there are any bugs or oversights :) Signed-off-by: Adam Belay <abelay@novell.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 2929d8996fbc77f41a5ff86bb67cdde3ca7d2d72 Author: Adam Belay <abelay@novell.com> Date: Sat Mar 24 03:46:58 2007 -0400 cpuidle: governor API changes This patch prepares cpuidle for the menu governor. It adds an optional stage after idle state entry to give the governor an opportunity to check why the state was exited. Also it makes sure the idle loop returns after each state entry, allowing the appropriate dynticks code to run. Signed-off-by: Adam Belay <abelay@novell.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 3a7fd42f9825c3b03e364ca59baa751bb350775f Author: Venki Pallipadi <venkatesh.pallipadi@intel.com> Date: Thu Apr 26 00:03:59 2007 -0700 cpuidle: hang fix Prevent hang on x86-64, when ACPI processor driver is added as a module on a system that does not support C-states. x86-64 expects all idle handlers to enable interrupts before returning from idle handler. This is due to enter_idle(), exit_idle() races. Make cpuidle_idle_call() confirm to this when there is no pm_idle_old. Also, cpuidle look at the return values of attch_driver() and set current_driver to NULL if attach fails on all CPUs. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 4893339a142afbd5b7c01ffadfd53d14746e858e Author: Shaohua Li <shaohua.li@intel.com> Date: Thu Apr 26 10:40:09 2007 +0800 cpuidle: add support for max_cstate limit With CPUIDLE framework, the max_cstate (to limit max cpu c-state) parameter is ingored. Some systems require it to ignore C2/C3 and some drivers like ipw require it too. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 43bbbbe1cb998cbd2df656f55bb3bfe30f30e7d1 Author: Shaohua Li <shaohua.li@intel.com> Date: Thu Apr 26 10:40:13 2007 +0800 cpuidle: add cpuidle_fore_redetect_devices API add cpuidle_force_redetect_devices API, which forces all CPU redetect idle states. Next patch will use it. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit d1edadd608f24836def5ec483d2edccfb37b1d19 Author: Shaohua Li <shaohua.li@intel.com> Date: Thu Apr 26 10:40:01 2007 +0800 cpuidle: fix sysfs related issue Fix the cpuidle sysfs issue. a. make kobject dynamicaly allocated b. fixed sysfs init issue to avoid suspend/resume issue Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 7169a5cc0d67b263978859672e86c13c23a5570d Author: Randy Dunlap <randy.dunlap@oracle.com> Date: Wed Mar 28 22:52:53 2007 -0400 cpuidle: 1-bit field must be unsigned A 1-bit bitfield has no room for a sign bit. drivers/cpuidle/governors/ladder.c:54:16: error: dubious bitfield without explicit `signed' or `unsigned' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 4658620158dc2fbd9e4bcb213c5b6fb5d05ba7d4 Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Date: Wed Mar 28 22:52:41 2007 -0400 cpuidle: fix boot hang Patch for cpuidle boot hang reported by Larry Finger here. http://www.ussg.iu.edu/hypermail/linux/kernel/0703.2/2025.html Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Larry Finger <larry.finger@lwfinger.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit c17e168aa6e5fe3851baaae8df2fbc1cf11443a9 Author: Len Brown <len.brown@intel.com> Date: Wed Mar 7 04:37:53 2007 -0500 cpuidle: ladder does not depend on ACPI build fix for CONFIG_ACPI=n In file included from drivers/cpuidle/governors/ladder.c:21: include/acpi/processor.h:88: error: expected specifier-qualifier-list before ‘acpi_integer’ include/acpi/processor.h:106: error: expected specifier-qualifier-list before ‘acpi_integer’ include/acpi/processor.h:168: error: expected specifier-qualifier-list before ‘acpi_handle’ Signed-off-by: Len Brown <len.brown@intel.com> commit 8c91d958246bde68db0c3f0c57b535962ce861cb Author: Adrian Bunk <bunk@stusta.de> Date: Tue Mar 6 02:29:40 2007 -0800 cpuidle: make code static This patch makes the following needlessly global code static: - driver.c: __cpuidle_find_driver() - governor.c: __cpuidle_find_governor() - ladder.c: struct ladder_governor Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Adam Belay <abelay@novell.com> Cc: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 0c39dc3187094c72c33ab65a64d2017b21f372d2 Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Date: Wed Mar 7 02:38:22 2007 -0500 cpu_idle: fix build break This patch fixes a build breakage with !CONFIG_HOTPLUG_CPU and CONFIG_CPU_IDLE. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 8112e3b115659b07df340ef170515799c0105f82 Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Date: Tue Mar 6 02:29:39 2007 -0800 cpuidle: build fix for !CPU_IDLE Fix the compile issues when CPU_IDLE is not configured. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Adam Belay <abelay@novell.com> Cc: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> commit 1eb4431e9599cd25e0d9872f3c2c8986821839dd Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Date: Thu Feb 22 13:54:57 2007 -0800 cpuidle take2: Basic documentation for cpuidle Documentation for cpuidle infrastructure Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Adam Belay <abelay@novell.com> Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> commit ef5f15a8b79123a047285ec2e3899108661df779 Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Date: Thu Feb 22 13:54:03 2007 -0800 cpuidle take2: Hookup ACPI C-states driver with cpuidle Hookup ACPI C-states onto generic cpuidle infrastructure. drivers/acpi/procesor_idle.c is now a ACPI C-states driver that registers as a driver in cpuidle infrastructure and the policy part is removed from drivers/acpi/processor_idle.c. We use governor in cpuidle instead. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Adam Belay <abelay@novell.com> Signed-off-by: Len Brown <len.brown@intel.com> commit 987196fa82d4db52c407e8c9d5dec884ba602183 Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Date: Thu Feb 22 13:52:57 2007 -0800 cpuidle take2: Core cpuidle infrastructure Announcing 'cpuidle', a new CPU power management infrastructure to manage idle CPUs in a clean and efficient manner. cpuidle separates out the drivers that can provide support for multiple types of idle states and policy governors that decide on what idle state to use at run time. A cpuidle driver can support multiple idle states based on parameters like varying power consumption, wakeup latency, etc (ACPI C-states for example). A cpuidle governor can be usage model specific (laptop, server, laptop on battery etc). Main advantage of the infrastructure being, it allows independent development of drivers and governors and allows for better CPU power management. A huge thanks to Adam Belay and Shaohua Li who were part of this mini-project since its beginning and are greatly responsible for this patchset. This patch: Core cpuidle infrastructure. Introduces a new abstraction layer for cpuidle: * which manages drivers that can support multiple idles states. Drivers can be generic or particular to specific hardware/platform * allows pluging in multiple policy governors that can take idle state policy decision * The core also has a set of sysfs interfaces with which administrato can know about supported drivers and governors and switch them at run time. Signed-off-by: Adam Belay <abelay@novell.com> Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* [MIPS] Au1000: set the PCI controller IO baseFlorian Fainelli2007-10-09
| | | | | | | | | The PCI controller IO base was not set in the au1000 pci code. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Alchemy: Fix USB initialization.Florian Fainelli2007-10-09
| | | | | | | | | | | | | | | | | | | | | This patch fixes a wrong ifdef in the board setup code, leading to the GPIO pin not being pulled high, and thus the USB switch not being powered at all. This finishes the rename of CONFIG_USB_OHCI to CONFIG_USB_OHCI_HCD, which started in 2005 (before 2.6.12-rc2), then probably because things were working anyway for most people got forgotten. [Ralf: Paolo's original patch didn't fix the module case, Florian's patch only fixed MTX1 etc. so this is a combined patch plus some cleanups.] Cc: Giuseppe Patanè <giuseppe.patane@tvblob.com> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] IP32: Fix fatal typo in address computation.Giuseppe Sacco2007-10-09
| | | | | Signed-off-by: Giuseppe Sacco <eppesuig@debian.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Longhaul: add auto enabled "revid_errata" optionRafal Bilski2007-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | VIA C3 Ezra-T has RevisionID equal to 1, but it needs RevisionKey to be 0 or CPU will ignore new frequency and will continue to work at old frequency. New "revid_errata" option will force RevisionKey to be set to 0, whatever RevisionID is. Additionaly "Longhaul" will not silently ignore unsuccessful transition. It will try to check if "revid_errata" or "disable_acpi_c3" options need to be enabled for this processor/system. Same for Longhaul ver. 2 support. It will be disabled if none of above options will work. Best case scenario (with patch apllied and v2 enabled): longhaul: VIA C3 'Ezra' [C5C] CPU detected. Longhaul v2 supported. longhaul: Using northbridge support. longhaul: VRM 8.5 longhaul: Max VID=1.350 Min VID=1.050, 13 possible voltage scales longhaul: f: 300000 kHz, index: 0, vid: 1050 mV [...] longhaul: Voltage scaling enabled. Worst case scenario: longhaul: VIA C3 'Ezra-T' [C5M] CPU detected. Powersaver supported. longhaul: Using northbridge support. longhaul: Using ACPI support. longhaul: VRM 8.5 longhaul: Claims to support voltage scaling but min & max are both 1.250. Voltage scaling disabled longhaul: Failed to set requested frequency! longhaul: Enabling "Ignore Revision ID" option. longhaul: Failed to set requested frequency! longhaul: Disabling ACPI C3 support. longhaul: Disabling "Ignore Revision ID" option. longhaul: Failed to set requested frequency! longhaul: Enabling "Ignore Revision ID" option. [akpm@linux-foundation.org: coding-style cleanups] Signed-off-by: Rafal Bilski <rafalbilski@interia.pl> Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2007-10-06
|\ | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] IP32: Enable PCI bridges
| * [MIPS] IP32: Enable PCI bridgesGiuseppe Sacco2007-10-05
| | | | | | | | | | | | | | | | | | Fixe MACE PCI addressing by adding the bus number parameter. Remove check of the used slot since every slot should be valid. Converted mkaddr from #define to inline function. Signed-off-by: Giuseppe Sacco <eppesuig@debian.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2007-10-05
|\ \ | | | | | | | | | | | | | | | * master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 4598/2: OSIRIS: Ensure we do not get nRSTOUT during suspend [ARM] 4597/2: OSIRIS: ensure CPLD0 is preserved after suspend
| * | [ARM] 4598/2: OSIRIS: Ensure we do not get nRSTOUT during suspendBen Dooks2007-10-05
| | | | | | | | | | | | | | | | | | | | | Ensure nRSTOUT is not asserted during or on resume. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | [ARM] 4597/2: OSIRIS: ensure CPLD0 is preserved after suspendBen Dooks2007-10-05
| |/ | | | | | | | | | | | | | | | | Ensure that CPLD is restored to the original state on resume, and that before going into suspend we select the NAND bank we booted from for restarting. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | Merge branch 'master' of ↵Linus Torvalds2007-10-05
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Fix 'niu' complex IRQ probing. [SPARC64]: check fork_idle() error [SPARC64]: Temporary workaround for PCI-E slot on T1000. [SPARC64]: VIO device addition log message level is too high. [SPARC64]: Fix domain-services port probing. [SPARC64]: Don't use in/local regs for ldx/stx data in N1 memcpy.
| * [SPARC64]: Fix 'niu' complex IRQ probing.David S. Miller2007-10-04
| | | | | | | | | | | | | | They should be computed the same as how we compute them under 'virtual-devices'. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: check fork_idle() errorAkinobu Mita2007-10-04
| | | | | | | | | | | | | | Check the return value of fork_idle() to catch error. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Temporary workaround for PCI-E slot on T1000.David S. Miller2007-10-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PCI-E slot on T1000 connects directly to the Fire PCI chip with no intervening bridges visible in the OBP tree. Unfortunately the bus numbering of the device in that slot is different (2) from the PCI host controller (0), and thus the pci_bus_{read,write}_config_*() calls don't work out. Complicating things further the Fire PCI controller has no config space it responds to either. For now treat this case specially so that devices in the slot work. Longer term we need to perhaps cons up a dummy bridge between the Fire and the PCI-E slot so that the bus hierarchy is complete inside of the kernel and thus the bus numbering all works out right. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: VIO device addition log message level is too high.David S. Miller2007-10-04
| | | | | | | | | | | | | | There is no reason this should be KERN_ERR, KERN_INFO is just fine. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix domain-services port probing.David S. Miller2007-10-04
| | | | | | | | | | | | | | We should only use ports underneath "domain-services", other DS ports in the MDESC aren't for us to use. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Don't use in/local regs for ldx/stx data in N1 memcpy.David S. Miller2007-10-02
| | | | | | | | | | | | | | | | | | | | It doesn't matter for use in 64-bit objects, but when used in 32-bit environments the top 32-bits of the local and in registers will get chopped off on the next register window spill/restore which leads to difficult to track down and subtle bugs. Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2007-10-03
|\ \ | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] Terminally fix local_{dec,sub}_if_positive [MIPS] Type proof reimplementation of cmpxchg. [MIPS] pg-r4k.c: Fix a typo in an R4600 v2 erratum workaround
| * | [MIPS] pg-r4k.c: Fix a typo in an R4600 v2 erratum workaroundMaciej W. Rozycki2007-10-03
| |/ | | | | | | | | | | | | | | Restore a load from KSEG1 done as a workaround for an R4600 v2 erratum, dropped with 211be16de99a7424e66c0b6c0d00e2c970508ac2. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | Blackfin arch: fix PORT_J BUG for BF537/6 EMAC driver reported by Kalle ↵Michael Hennerich2007-10-03
| | | | | | | | | | | | | | | | | | Pokki <kalle.pokki@iki.fi> Cc: Kalle Pokki <kalle.pokki@iki.fi> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* | Blackfin arch: gpio pinmux and resource allocation API required by BF537 on ↵Michael Hennerich2007-10-03
| | | | | | | | | | | | | | | | chip ethernet mac driver Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* | Blackfin arch: add some missing syscallBryan Wu2007-09-22
|/ | | | | | | | | | | When compiling the Blackfin kernel, checksyscalls.pl will report lots of missing syscalls warnings. This patch will add some missing syscalls which make sense on Blackfin arch After appling this patch, toolchain should be rebuilt. Then recompiling the kernel with the new toolchain. Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Merge branch 'master' of ↵Linus Torvalds2007-10-02
|\ | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Fix missing load-twin usage in Niagara-1 memcpy. [SPARC64]: Fix put_user() calls in binfmt_aout32.c [SPARC]: Fix EBUS use of uninitialized variable.
| * [SPARC64]: Fix missing load-twin usage in Niagara-1 memcpy.David S. Miller2007-10-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | For the case where the source is not aligned modulo 8 we don't use load-twins to suck the data in and this kills performance since normal loads allocate in the L1 cache (unlike load-twin) and thus big memcpys swipe the entire L1 D-cache. We need to allocate a register window to implement this properly, but that actually simplifies a lot of things as a nice side-effect. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix put_user() calls in binfmt_aout32.cDavid S. Miller2007-09-30
| | | | | | | | | | | | | | | | | | | | argv and envp are pointers to u32's in userspace, so don't try to put_user() a NULL to them. Aparently gcc-4.2.x now warns about this, and since we use -Werror for arch/sparc64 code, this breaks the build. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC]: Fix EBUS use of uninitialized variable.David S. Miller2007-09-27
| | | | | | | | | | | | | | | | | | | | If of_get_property() fails, it returns NULL and the 'len' parameter is undefined. So we need to explicitly set len to zero in such cases. Noticed by Al Viro. Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'merge' of ↵Linus Torvalds2007-10-02
|\ \ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Fix xics set_affinity code
| * | [POWERPC] Fix xics set_affinity codeAnton Blanchard2007-10-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On a POWER6 machine running 2.6.23-rc8 I sometimes see the following error: xics_set_affinity: No online cpus in the mask 00000000,00000000,00000000,00000001 for irq 20 In a desperate attempt to get a changelog entry in 2.6.23, I took a look into it. It turns out we are passing a real and not a virtual irq into get_irq_server. This works for the case where hwirq < NR_IRQS and we set virq = hwirq. In my case however hwirq = 590082 and we try and access irq_desc[590082], slightly past the end at 512 entries. Lucky we ship lots of memory with our machines. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2007-10-01
|\ \ \ | | | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] vmlinux.lds.S: Handle note sections [MIPS] Fix value of O_TRUNC
| * | | [MIPS] vmlinux.lds.S: Handle note sectionsMaciej W. Rozycki2007-10-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Store any note sections after the exception tables like the other architectures do. This is required for .note.gnu.build-id emitted from binutils 2.18 onwards if nothing else. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | | x86_64: increase VDSO_TEXT_OFFSET for ancient binutilsAndi Kleen2007-10-01
| |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For some reason old binutils genertate larger headers so increase the text offset of the vdso to avoid linker errors. Roland McGrath explains: "There are extra symbols in the '.dynsym' section that are responsible for the size difference (They also cause corresponding inflation in '.gnu.version') Older ld's wrongly generated these unneeded symbols in .dynsym. This was fixed not all that long ago (2006); binutils-2.17.50.0.6 might be the first fixed version, but I have not verified for sure where the cutoff was. The unneeded symbols et al from old ld add almost 700 bytes excess. This limits fairly tightly the amount by which the actual text and data in the vDSO can grow in the future without pushing the whole file over 4kb. If it does grow later on, we should consider changing the layout with a config option or something to pack it better without that padding, when building the kernel with newer binutils." Signed-off-by: Andi Kleen <ak@suse.de> Cc: Roland McGrath <roland@redhat.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | [ARM] Resolve PCI section warningsRussell King2007-09-30
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the following (valid) section warnings: WARNING: vmlinux.o(.text+0xf7b5c): Section mismatch: reference to .init.text:pcibios_fixup_bus (between 'pci_scan_child_bus' and 'pci_scan_bridge') WARNING: vmlinux.o(.text+0xfc5f4): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_map_rom' and 'pci_unmap_rom') WARNING: vmlinux.o(.text+0xfc824): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_update_resource' and 'pci_claim_resource') WARNING: vmlinux.o(.text+0xfd6d8): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'find_free_bus_resource') WARNING: vmlinux.o(.text+0xfd730): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'find_free_bus_resource') WARNING: vmlinux.o(.text+0xfd788): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'find_free_bus_resource') WARNING: vmlinux.o(.text+0xfd7e0): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'find_free_bus_resource') WARNING: vmlinux.o(.text+0xfe024): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_bus_assign_resources' and 'sys_pciconfig_read') WARNING: vmlinux.o(.text+0xfe0f4): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_bus_assign_resources' and 'sys_pciconfig_read') WARNING: vmlinux.o(.text+0xfe17c): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_bus_assign_resources' and 'sys_pciconfig_read') Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | Merge branch 'for-2.6.23' of ↵Linus Torvalds2007-09-28
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc * 'for-2.6.23' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc: [POWERPC] mpc8349emitx.dts: Setup USB-DR for peripheral mode. [POWERPC] Fix mpc834x USB-MPH configuration. [POWERPC] Fix cpm_uart driver for cpm1 machines [PPC] Fix cpm_dpram_addr returning phys mem instead of virt mem [POWERPC] Fix copy'n'paste typo in commproc.c
| * | [POWERPC] mpc8349emitx.dts: Setup USB-DR for peripheral mode.jacmet@sunsite.dk2007-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Setup dr_mode for USB-DR to peripheral as the default (host mode) doesn't make much sense for the mini-AB connector on the ITX board. Peripheral mode is preferable to OTG as the fsl_usb2_udc.c driver doesn't yet properly support it. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * | [POWERPC] Fix mpc834x USB-MPH configuration.jacmet@sunsite.dk2007-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | mpc834x USB-MPH configuration got broken by commit 6f442560021aecf08658e26ed9a37e6928ef0fa1. The selection bits in SICRL should be cleared rather than set to configure the USB MUXes for the MPH. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * | [PPC] Fix cpm_dpram_addr returning phys mem instead of virt memJochen Friedrich2007-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cpm_dpram_addr returns physical memory of the DP RAM instead of iomapped virtual memory. As there usually is a 1:1 MMU map of the IMMR area, this is often not noticed. However, cpm_dpram_phys assumes this iomapped virtual memory and returns garbage on the 1:1 mapped memory causing CPM1 uart console to fail. This patch fixes the problem (copied from the powerpc tree). Signed-off-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * | [POWERPC] Fix copy'n'paste typo in commproc.cJochen Friedrich2007-09-28
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The powerpc version of commproc.c exports cpm_dpram_addr twice and cpm_dpram_phys not at all due to a typo. This patch fixes this problem. CC arch/powerpc/sysdev/commproc.o arch/powerpc/sysdev/commproc.c:398: error: redefinition of '__kcrctab_cpm_dpram_addr' arch/powerpc/sysdev/commproc.c:392: error: previous definition of '__kcrctab_cpm_dpram_addr' was here arch/powerpc/sysdev/commproc.c:398: error: redefinition of '__kstrtab_cpm_dpram_addr' arch/powerpc/sysdev/commproc.c:392: error: previous definition of '__kstrtab_cpm_dpram_addr' was here arch/powerpc/sysdev/commproc.c:398: error: redefinition of '__ksymtab_cpm_dpram_addr' arch/powerpc/sysdev/commproc.c:392: error: previous definition of '__ksymtab_cpm_dpram_addr' was here make[1]: *** [arch/powerpc/sysdev/commproc.o] Error 1 make: *** [arch/powerpc/sysdev] Error 2 Signed-off-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2007-09-28
|\ \ | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] Fix fallocate on o32 binary compat ABI [MIPS] Fix CONFIG_BUILD_ELF64 kernels with symbols in CKSEG0. [MIPS] IP32: Fix initialization of UART base addresses.
| * | [MIPS] Fix fallocate on o32 binary compat ABIKyle McMartin2007-09-28
| | | | | | | | | | | | | | | | | | | | | | | | MIPS was mistakenly forgetting to use the fallocate compat wrapper, which I noticed while cleaning up all the duplicate fallocate wrappers. Signed-off-by: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] IP32: Fix initialization of UART base addresses.Ralf Baechle2007-09-28
| |/ | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | Merge branch 'for-linus' of ↵Linus Torvalds2007-09-28
|\ \ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup: [x86 setup] Correct the SMAP check for INT 0x15, AX=0xe820
| * | [x86 setup] Correct the SMAP check for INT 0x15, AX=0xe820H. Peter Anvin2007-09-28
| |/ | | | | | | | | | | | | | | | | | | | | | | The e820 probe code was checking %edx, not %eax, for the SMAP signature on return. This worked on *almost* all systems, since %edx still contained SMAP from the call on entry, but on a handful of systems it failed -- plus, we would have missed real mismatches. The error output is "=d" to make sure gcc knows %edx is clobbered here. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* / [MIPS] IP32: Fix initialization of UART base addresses.Ralf Baechle2007-09-27
|/ | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2007-09-26
|\ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup: [x86 setup] Handle case of improperly terminated E820 chain
| * [x86 setup] Handle case of improperly terminated E820 chainH. Peter Anvin2007-09-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At least one system (a Geode system with a Digital Logic BIOS) has been found which suddenly stops reporting the SMAP signature when reading the E820 memory chain. We can't know what, exactly, broke in the BIOS, so if we detect this situation, declare the E820 data unusable and fall back to E801. Also, revert to original behavior of always probing all memory methods; that way all the memory information is available to the kernel. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: Joerg Pommnitz <pommnitz@yahoo.com>
* | Revert "x86-64: Disable local APIC timer use on AMD systems with C1E"Linus Torvalds2007-09-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit e66485d747505e9d960b864fc6c37f8b2afafaf0, since Rafael Wysocki noticed that the change only works for his in -mm, not in mainline (and that both "noapictimer" _and_ "apicmaintimer" are broken on his hardware, but that's apparently not a regression, just a symptom of the same issue that causes the automatic apic timer disable to not work). It turns out that it really doesn't work correctly on x86-64, since x86-64 doesn't use the generic clock events for timers yet. Thanks to Rafal for testing, and here's the ugly details on x86-64 as per Thomas: "I just looked into the code and the logic vs. noapictimer on SMP is completely broken. On i386 the noapictimer option not only disables the local APIC timer, it also registers the CPUs for broadcasting via IPI on SMP systems. The x86-64 code uses the broadcast only when the local apic timer is active, i.e. "noapictimer" is not on the command line. This defeats the whole purpose of "noapictimer". It should be there to make boxen work, where the local APIC timer actually has a hardware problem, e.g. the nx6325. The current implementation of x86_64 only fixes the ACPI c-states related problem where the APIC timer stops in C3(2), nothing else. On nx6325 and other AMD X2 equipped systems which have the C1E enabled we run into the following: PIT keeps jiffies (and the system) running, but the local APIC timer interrupts can get out of sync due to this C1E effect. I don't think this is a critical problem, but it is wrong nevertheless. I think it's safe to revert the C1E patch and postpone the fix to the clock events conversion." On further reflection, Thomas noted: "It's even worse than I thought on the first check: "noapictimer" on the command line of an SMP box prevents _ONLY_ the boot CPU apic timer from being used. But the secondary CPU is still unconditionally setting up the APIC timer and uses the non calibrated variable calibration_result, which is of course 0, to setup the APIC timer. Wreckage guaranteed." so we'll just have to wait for the x86 merge to hopefully fix this up for x86-64. Tested-and-requested-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | xen: execve's error paths don't pin the mm before unpinningJeremy Fitzhardinge2007-09-26
| | | | | | | | | | | | | | | | | | | | execve's error paths don't activate (and therefore pin) the mm before calling exit_mmap to free it up, so don't try to unpin unless it is actually pinned. This prevents a BUG_ON from triggering. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Christian Ostheimer <osth@freesurf.ch> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | x86-64: Disable local APIC timer use on AMD systems with C1EThomas Gleixner2007-09-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 3556ddfa9284a86a59a9b78fe5894430f6ab4eef titled [PATCH] x86-64: Disable local APIC timer use on AMD systems with C1E solves a problem with AMD dual core laptops e.g. HP nx6325 (Turion 64 X2) with C1E enabled: When both cores go into idle at the same time, then the system switches into C1E state, which is basically the same as C3. This stops the local apic timer. This was debugged right after the dyntick merge on i386 and despite the patch title it fixes only the 32 bit path. x86_64 is still missing this fix. It seems that mainline is not really affected by this issue, as the PIT is running and keeps jiffies incrementing, but that's just waiting for trouble. -mm suffers from this problem due to the x86_64 high resolution timer patches. This is a quick and dirty port of the i386 code to x86_64. I spent quite a time with Rafael to debug the -mm / hrt wreckage until someone pointed us to this. I really had forgotten that we debugged this half a year ago already. Sigh, is it just me or is there something yelling arch/x86 into my ear? Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [POWERPC] spufs: fix mismerge, making context signal{1,2} files readable againJeremy Kerr2007-09-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit 8b6f50ef1d5cc86b278eb42bc91630fad455fb10 seems to have been affected by a mismerge of a duplicate patch (d054b36ffd302ec65aabec16a0c60ddd9e6b5a62) - both the spufs_dir_contents and spufs_dir_nosched_contents have been given write-only signal notification files. This change reverts the spufs_dir_contents array to use the readable signal notification file implementation. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [POWERPC] Ensure FULL_REGS on execRoland McGrath2007-09-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When PTRACE_O_TRACEEXEC is used, a ptrace call to fetch the registers at the PTRACE_EVENT_EXEC stop (PTRACE_PEEKUSR) will oops in CHECK_FULL_REGS. With recent versions, "gdb --args /bin/sh -c 'exec /bin/true'" and "run" at the (gdb) prompt is sufficient to produce this. I also have written an isolated test case, see https://bugzilla.redhat.com/show_bug.cgi?id=301791#c15. This change fixes the problem by clearing the low bit of pt_regs.trap in start_thread so that FULL_REGS is true again. This is correct since all of the GPRs that "full" refers to are cleared in start_thread. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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