linux/kernel
Linus Torvalds 02b9735c12 ACPI and power management fixes for 3.12-rc1
1) ACPI-based PCI hotplug (ACPIPHP) fixes related to spurious events
 
   After the recent ACPIPHP changes we've seen some interesting breakage
   on a system that triggers device check notifications during boot for
   non-existing devices.  Although those notifications are really
   spurious, we should be able to deal with them nevertheless and that
   shouldn't introduce too much overhead.  Four commits to make that
   work properly.
 
  2) Memory hotplug and hibernation mutual exclusion rework
 
   This was maent to be a cleanup, but it happens to fix a classical
   ABBA deadlock between system suspend/hibernation and ACPI memory
   hotplug which is possible if they are started roughly at the same
   time.  Three commits rework memory hotplug so that it doesn't
   acquire pm_mutex and make hibernation use device_hotplug_lock
   which prevents it from racing with memory hotplug.
 
  3) ACPI Intel LPSS (Low-Power Subsystem) driver crash fix
 
   The ACPI LPSS driver crashes during boot on Apple Macbook Air with
   Haswell that has slightly unusual BIOS configuration in which one
   of the LPSS device's _CRS method doesn't return all of the information
   expected by the driver.  Fix from Mika Westerberg, for stable.
 
  4) ACPICA fix related to Store->ArgX operation
 
   AML interpreter fix for obscure breakage that causes AML to be
   executed incorrectly on some machines (observed in practice).  From
   Bob Moore.
 
  5) ACPI core fix for PCI ACPI device objects lookup
 
   There still are cases in which there is more than one ACPI device
   object matching a given PCI device and we don't choose the one that
   the BIOS expects us to choose, so this makes the lookup take more
   criteria into account in those cases.
 
  6) Fix to prevent cpuidle from crashing in some rare cases
 
   If the result of cpuidle_get_driver() is NULL, which can happen on
   some systems, cpuidle_driver_ref() will crash trying to use that
   pointer and the Daniel Fu's fix prevents that from happening.
 
  7) cpufreq fixes related to CPU hotplug
 
   Stephen Boyd reported a number of concurrency problems with cpufreq
   related to CPU hotplug which are addressed by a series of fixes
   from Srivatsa S Bhat and Viresh Kumar.
 
  8) cpufreq fix for time conversion in time_in_state attribute
 
   Time conversion carried out by cpufreq when user space attempts to
   read /sys/devices/system/cpu/cpu*/cpufreq/stats/time_in_state won't
   work correcty if cputime_t doesn't map directly to jiffies.  Fix
   from Andreas Schwab.
 
  9) Revert of a troublesome cpufreq commit
 
   Commit 7c30ed5 (cpufreq: make sure frequency transitions are
   serialized) was intended to address some known concurrency problems
   in cpufreq related to the ordering of transitions, but unfortunately
   it introduced several problems of its own, so I decided to revert it
   now and address the original problems later in a more robust way.
 
 10) Intel Haswell CPU models for intel_pstate from Nell Hardcastle.
 
 11) cpufreq fixes related to system suspend/resume
 
   The recent cpufreq changes that made it preserve CPU sysfs attributes
   over suspend/resume cycles introduced a possible NULL pointer
   dereference that caused it to crash during the second attempt to
   suspend.  Three commits from Srivatsa S Bhat fix that problem and a
   couple of related issues.
 
 12) cpufreq locking fix
 
   cpufreq_policy_restore() should acquire the lock for reading, but
   it acquires it for writing.  Fix from Lan Tianyu.
 
 /
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Merge tag 'pm+acpi-fixes-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:
 "All of these commits are fixes that have emerged recently and some of
  them fix bugs introduced during this merge window.

  Specifics:

   1) ACPI-based PCI hotplug (ACPIPHP) fixes related to spurious events

      After the recent ACPIPHP changes we've seen some interesting
      breakage on a system that triggers device check notifications
      during boot for non-existing devices.  Although those
      notifications are really spurious, we should be able to deal with
      them nevertheless and that shouldn't introduce too much overhead.
      Four commits to make that work properly.

   2) Memory hotplug and hibernation mutual exclusion rework

      This was maent to be a cleanup, but it happens to fix a classical
      ABBA deadlock between system suspend/hibernation and ACPI memory
      hotplug which is possible if they are started roughly at the same
      time.  Three commits rework memory hotplug so that it doesn't
      acquire pm_mutex and make hibernation use device_hotplug_lock
      which prevents it from racing with memory hotplug.

   3) ACPI Intel LPSS (Low-Power Subsystem) driver crash fix

      The ACPI LPSS driver crashes during boot on Apple Macbook Air with
      Haswell that has slightly unusual BIOS configuration in which one
      of the LPSS device's _CRS method doesn't return all of the
      information expected by the driver.  Fix from Mika Westerberg, for
      stable.

   4) ACPICA fix related to Store->ArgX operation

      AML interpreter fix for obscure breakage that causes AML to be
      executed incorrectly on some machines (observed in practice).
      From Bob Moore.

   5) ACPI core fix for PCI ACPI device objects lookup

      There still are cases in which there is more than one ACPI device
      object matching a given PCI device and we don't choose the one
      that the BIOS expects us to choose, so this makes the lookup take
      more criteria into account in those cases.

   6) Fix to prevent cpuidle from crashing in some rare cases

      If the result of cpuidle_get_driver() is NULL, which can happen on
      some systems, cpuidle_driver_ref() will crash trying to use that
      pointer and the Daniel Fu's fix prevents that from happening.

   7) cpufreq fixes related to CPU hotplug

      Stephen Boyd reported a number of concurrency problems with
      cpufreq related to CPU hotplug which are addressed by a series of
      fixes from Srivatsa S Bhat and Viresh Kumar.

   8) cpufreq fix for time conversion in time_in_state attribute

      Time conversion carried out by cpufreq when user space attempts to
      read /sys/devices/system/cpu/cpu*/cpufreq/stats/time_in_state
      won't work correcty if cputime_t doesn't map directly to jiffies.
      Fix from Andreas Schwab.

   9) Revert of a troublesome cpufreq commit

      Commit 7c30ed5 (cpufreq: make sure frequency transitions are
      serialized) was intended to address some known concurrency
      problems in cpufreq related to the ordering of transitions, but
      unfortunately it introduced several problems of its own, so I
      decided to revert it now and address the original problems later
      in a more robust way.

  10) Intel Haswell CPU models for intel_pstate from Nell Hardcastle.

  11) cpufreq fixes related to system suspend/resume

      The recent cpufreq changes that made it preserve CPU sysfs
      attributes over suspend/resume cycles introduced a possible NULL
      pointer dereference that caused it to crash during the second
      attempt to suspend.  Three commits from Srivatsa S Bhat fix that
      problem and a couple of related issues.

  12) cpufreq locking fix

      cpufreq_policy_restore() should acquire the lock for reading, but
      it acquires it for writing.  Fix from Lan Tianyu"

* tag 'pm+acpi-fixes-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (25 commits)
  cpufreq: Acquire the lock in cpufreq_policy_restore() for reading
  cpufreq: Prevent problems in update_policy_cpu() if last_cpu == new_cpu
  cpufreq: Restructure if/else block to avoid unintended behavior
  cpufreq: Fix crash in cpufreq-stats during suspend/resume
  intel_pstate: Add Haswell CPU models
  Revert "cpufreq: make sure frequency transitions are serialized"
  cpufreq: Use signed type for 'ret' variable, to store negative error values
  cpufreq: Remove temporary fix for race between CPU hotplug and sysfs-writes
  cpufreq: Synchronize the cpufreq store_*() routines with CPU hotplug
  cpufreq: Invoke __cpufreq_remove_dev_finish() after releasing cpu_hotplug.lock
  cpufreq: Split __cpufreq_remove_dev() into two parts
  cpufreq: Fix wrong time unit conversion
  cpufreq: serialize calls to __cpufreq_governor()
  cpufreq: don't allow governor limits to be changed when it is disabled
  ACPI / bind: Prefer device objects with _STA to those without it
  ACPI / hotplug / PCI: Avoid parent bus rescans on spurious device checks
  ACPI / hotplug / PCI: Use _OST to notify firmware about notify status
  ACPI / hotplug / PCI: Avoid doing too much for spurious notifies
  ACPICA: Fix for a Store->ArgX when ArgX contains a reference to a field.
  ACPI / hotplug / PCI: Don't trim devices before scanning the namespace
  ...
2013-09-12 11:22:45 -07:00
..
cpu
debug
events uprobes: Fix utask->depth accounting in handle_trampoline() 2013-09-12 08:00:55 +02:00
gcov
irq Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-07-13 15:37:30 -07:00
power ACPI and power management fixes for 3.12-rc1 2013-09-12 11:22:45 -07:00
printk TTY/Serial driver patches for 3.12-rc1 2013-09-03 11:38:36 -07:00
sched Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-09-12 10:44:13 -07:00
time Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-09-04 09:36:54 -07:00
trace Not much changes for the 3.12 merge window. The major tracing changes 2013-09-09 14:42:15 -07:00
.gitignore
acct.c
async.c
audit_tree.c
audit_watch.c
audit.c
audit.h audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record 2013-07-09 10:33:19 -07:00
auditfilter.c audit: Fix decimal constant description 2013-07-09 10:33:19 -07:00
auditsc.c audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record 2013-07-09 10:33:19 -07:00
backtracetest.c
bounds.c
capability.c xfs: update for v3.12-rc1 2013-09-09 11:19:09 -07:00
cgroup_freezer.c cgroup: make css_for_each_descendant() and friends include the origin css in the iteration 2013-08-08 20:11:27 -04:00
cgroup.c Kill indirect include of file.h from eventfd.h, use fdget() in cgroup.c 2013-09-07 19:54:57 -04:00
compat.c
configs.c
context_tracking.c context_tracking: User/kernel broundary cross trace events 2013-08-14 17:14:48 +02:00
cpu_pm.c
cpu.c ACPI / processor: Acquire writer lock to update CPU maps 2013-08-13 12:20:16 +02:00
cpuset.c Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2013-09-03 18:25:03 -07:00
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c ptrace: revert "Prepare to fix racy accesses on task breakpoints" 2013-07-09 10:33:26 -07:00
extable.c extable: skip sorting if the table is empty 2013-09-11 15:58:25 -07:00
fork.c mm: mempolicy: turn vma_set_policy() into vma_dup_policy() 2013-09-11 15:57:00 -07:00
freezer.c freezer: set PF_SUSPEND_TASK flag on tasks that call freeze_processes 2013-07-30 14:05:06 +02:00
futex_compat.c
futex.c
groups.c userns: Kill nsown_capable it makes the wrong thing easy 2013-08-30 23:44:11 -07:00
hrtimer.c kernel: delete __cpuinit usage from all core kernel files 2013-07-14 19:36:59 -04:00
hung_task.c hung_task debugging: Print more info when reporting the problem 2013-08-02 11:02:42 +02:00
irq_work.c
itimer.c
jump_label.c jump_label: Split jumplabel ratelimit 2013-08-09 07:53:54 -07:00
kallsyms.c
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c kexec: remove unnecessary return 2013-09-11 15:59:10 -07:00
kmod.c
kprobes.c kprobes: allow to specify custom allocator for insn caches 2013-09-11 15:58:52 -07:00
ksysfs.c
kthread.c
latencytop.c
lglock.c lglock: Update lockdep annotations to report recursive local locks 2013-07-12 13:51:19 +02:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
lockdep.c
Makefile printk: move to separate directory for easier modification 2013-07-31 14:41:03 -07:00
modsign_certificate.S
modsign_pubkey.c kernel/modsign_pubkey.c: fix init const for module signing code 2013-09-11 15:58:21 -07:00
module_signing.c
module-internal.h
module.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-09-05 08:50:26 -07:00
mutex-debug.c
mutex-debug.h
mutex.c Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-09-04 08:18:19 -07:00
mutex.h
notifier.c
nsproxy.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2013-09-07 14:35:32 -07:00
padata.c padata - Register hotcpu notifier after initialization 2013-08-29 14:37:59 +10:00
panic.c panic: call panic handlers before kmsg_dump 2013-09-11 15:59:30 -07:00
params.c module: Fix mod->mkobj.kobj potentially freed too early 2013-09-03 16:35:47 +09:30
pid_namespace.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2013-09-07 14:35:32 -07:00
pid.c pidns: Fix hang in zap_pid_ns_processes by sending a potentially extra wakeup 2013-08-30 17:30:37 -07:00
posix-cpu-timers.c
posix-timers.c
profile.c kernel: delete __cpuinit usage from all core kernel files 2013-07-14 19:36:59 -04:00
ptrace.c __ptrace_may_access() should not deny sub-threads 2013-09-11 15:59:01 -07:00
range.c
rcu.h rcu: Make call_rcu() leak callbacks for debug-object errors 2013-08-18 17:40:03 -07:00
rcupdate.c Not much changes for the 3.12 merge window. The major tracing changes 2013-09-09 14:42:15 -07:00
rcutiny_plugin.h rcu: Add const annotation to char * for RCU tracepoints and functions 2013-07-29 17:07:49 -04:00
rcutiny.c rcu: Add const annotation to char * for RCU tracepoints and functions 2013-07-29 17:07:49 -04:00
rcutorture.c rcu: Make rcutorture emit online failures if verbose 2013-08-20 11:38:45 -07:00
rcutree_plugin.h nohz_full: Force RCU's grace-period kthreads onto timekeeping CPU 2013-08-31 14:44:02 -07:00
rcutree_trace.c
rcutree.c Merge branches 'doc.2013.08.19a', 'fixes.2013.08.20a', 'sysidle.2013.08.31a' and 'torture.2013.08.20a' into HEAD 2013-08-31 14:44:45 -07:00
rcutree.h nohz_full: Force RCU's grace-period kthreads onto timekeeping CPU 2013-08-31 14:44:02 -07:00
reboot.c reboot: move arch/x86 reboot= handling to generic kernel 2013-07-09 10:33:29 -07:00
relay.c kernel: delete __cpuinit usage from all core kernel files 2013-07-14 19:36:59 -04:00
res_counter.c
resource.c
rtmutex_common.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rwsem.c
seccomp.c
semaphore.c
signal.c kernel-wide: fix missing validations on __get/__put/__copy_to/__copy_from_user() 2013-09-11 15:58:18 -07:00
smp.c kernel/smp.c: quit unconditionally enabling irqs in on_each_cpu_mask(). 2013-09-11 15:58:25 -07:00
smpboot.c kernel: delete __cpuinit usage from all core kernel files 2013-07-14 19:36:59 -04:00
smpboot.h
softirq.c kernel: delete __cpuinit usage from all core kernel files 2013-07-14 19:36:59 -04:00
spinlock.c kernel/spinlock.c: add default arch_*_relax definitions for GENERIC_LOCKBREAK 2013-09-11 15:58:21 -07:00
srcu.c
stacktrace.c
stop_machine.c
sys_ni.c
sys.c userns: Kill nsown_capable it makes the wrong thing easy 2013-08-30 23:44:11 -07:00
sysctl_binary.c
sysctl.c mm: prepare to remove /proc/sys/vm/hugepages_treat_as_movable 2013-09-11 15:57:49 -07:00
task_work.c task_work: documentation 2013-09-11 15:58:27 -07:00
taskstats.c
test_kprobes.c
time.c
timeconst.bc
timer.c kernel: delete __cpuinit usage from all core kernel files 2013-07-14 19:36:59 -04:00
tracepoint.c
tsacct.c
uid16.c userns: Kill nsown_capable it makes the wrong thing easy 2013-08-30 23:44:11 -07:00
up.c smp.h: move !SMP version of on_each_cpu() out-of-line 2013-09-11 15:58:25 -07:00
user_namespace.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2013-09-07 14:35:32 -07:00
user-return-notifier.c
user.c userns: Better restrictions on when proc and sysfs can be mounted 2013-08-26 19:17:03 -07:00
utsname_sysctl.c
utsname.c userns: Kill nsown_capable it makes the wrong thing easy 2013-08-30 23:44:11 -07:00
wait.c kernel: fix new kernel-doc warning in wait.c 2013-08-19 09:08:54 -07:00
watchdog.c watchdog: Make it work under full dynticks 2013-07-30 22:29:15 +02:00
workqueue_internal.h
workqueue.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-09-06 09:36:28 -07:00