Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel...

Pull percpu consistent-ops changes from Tejun Heo:
 "Way back, before the current percpu allocator was implemented, static
  and dynamic percpu memory areas were allocated and handled separately
  and had their own accessors.  The distinction has been gone for many
  years now; however, the now duplicate two sets of accessors remained
  with the pointer based ones - this_cpu_*() - evolving various other
  operations over time.  During the process, we also accumulated other
  inconsistent operations.

  This pull request contains Christoph's patches to clean up the
  duplicate accessor situation.  __get_cpu_var() uses are replaced with
  with this_cpu_ptr() and __this_cpu_ptr() with raw_cpu_ptr().

  Unfortunately, the former sometimes is tricky thanks to C being a bit
  messy with the distinction between lvalues and pointers, which led to
  a rather ugly solution for cpumask_var_t involving the introduction of
  this_cpu_cpumask_var_ptr().

  This converts most of the uses but not all.  Christoph will follow up
  with the remaining conversions in this merge window and hopefully
  remove the obsolete accessors"

* 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (38 commits)
  irqchip: Properly fetch the per cpu offset
  percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t -fix
  ia64: sn_nodepda cannot be assigned to after this_cpu conversion. Use __this_cpu_write.
  percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t
  Revert "powerpc: Replace __get_cpu_var uses"
  percpu: Remove __this_cpu_ptr
  clocksource: Replace __this_cpu_ptr with raw_cpu_ptr
  sparc: Replace __get_cpu_var uses
  avr32: Replace __get_cpu_var with __this_cpu_write
  blackfin: Replace __get_cpu_var uses
  tile: Use this_cpu_ptr() for hardware counters
  tile: Replace __get_cpu_var uses
  powerpc: Replace __get_cpu_var uses
  alpha: Replace __get_cpu_var
  ia64: Replace __get_cpu_var uses
  s390: cio driver &__get_cpu_var replacements
  s390: Replace __get_cpu_var uses
  mips: Replace __get_cpu_var uses
  MIPS: Replace __get_cpu_var uses in FPU emulator.
  arm: Replace __this_cpu_ptr with raw_cpu_ptr
  ...

diff --cc arch/blackfin/mach-common/ints-priority.c
Simple merge

diff --cc arch/mips/kernel/perf_event_mipsxx.c
Simple merge

diff --cc arch/powerpc/include/asm/cputime.h
Simple merge

diff --cc arch/s390/include/asm/irq.h
Simple merge

diff --cc arch/s390/kernel/idle.c
index c846aee,0000000..7559f1b
mode 100644,000000..100644
--- 1/arch/s390/kernel/idle.c
--- /dev/null
+++ b/arch/s390/kernel/idle.c
@@@ -1,124 -1,0 +1,124 @@@
-       struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
 +/*
 + * Idle functions for s390.
 + *
 + * Copyright IBM Corp. 2014
 + *
 + * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 + */
 +
 +#include <linux/kernel.h>
 +#include <linux/kernel_stat.h>
 +#include <linux/kprobes.h>
 +#include <linux/notifier.h>
 +#include <linux/init.h>
 +#include <linux/cpu.h>
 +#include <asm/cputime.h>
 +#include <asm/nmi.h>
 +#include <asm/smp.h>
 +#include "entry.h"
 +
 +static DEFINE_PER_CPU(struct s390_idle_data, s390_idle);
 +
 +void __kprobes enabled_wait(void)
 +{
++      struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
 +      unsigned long long idle_time;
 +      unsigned long psw_mask;
 +
 +      trace_hardirqs_on();
 +
 +      /* Wait for external, I/O or machine check interrupt. */
 +      psw_mask = PSW_KERNEL_BITS | PSW_MASK_WAIT | PSW_MASK_DAT |
 +              PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
 +      clear_cpu_flag(CIF_NOHZ_DELAY);
 +
 +      /* Call the assembler magic in entry.S */
 +      psw_idle(idle, psw_mask);
 +
 +      /* Account time spent with enabled wait psw loaded as idle time. */
 +      idle->sequence++;
 +      smp_wmb();
 +      idle_time = idle->clock_idle_exit - idle->clock_idle_enter;
 +      idle->clock_idle_enter = idle->clock_idle_exit = 0ULL;
 +      idle->idle_time += idle_time;
 +      idle->idle_count++;
 +      account_idle_time(idle_time);
 +      smp_wmb();
 +      idle->sequence++;
 +}
 +
 +static ssize_t show_idle_count(struct device *dev,
 +                              struct device_attribute *attr, char *buf)
 +{
 +      struct s390_idle_data *idle = &per_cpu(s390_idle, dev->id);
 +      unsigned long long idle_count;
 +      unsigned int sequence;
 +
 +      do {
 +              sequence = ACCESS_ONCE(idle->sequence);
 +              idle_count = ACCESS_ONCE(idle->idle_count);
 +              if (ACCESS_ONCE(idle->clock_idle_enter))
 +                      idle_count++;
 +      } while ((sequence & 1) || (ACCESS_ONCE(idle->sequence) != sequence));
 +      return sprintf(buf, "%llu\n", idle_count);
 +}
 +DEVICE_ATTR(idle_count, 0444, show_idle_count, NULL);
 +
 +static ssize_t show_idle_time(struct device *dev,
 +                              struct device_attribute *attr, char *buf)
 +{
 +      struct s390_idle_data *idle = &per_cpu(s390_idle, dev->id);
 +      unsigned long long now, idle_time, idle_enter, idle_exit;
 +      unsigned int sequence;
 +
 +      do {
 +              now = get_tod_clock();
 +              sequence = ACCESS_ONCE(idle->sequence);
 +              idle_time = ACCESS_ONCE(idle->idle_time);
 +              idle_enter = ACCESS_ONCE(idle->clock_idle_enter);
 +              idle_exit = ACCESS_ONCE(idle->clock_idle_exit);
 +      } while ((sequence & 1) || (ACCESS_ONCE(idle->sequence) != sequence));
 +      idle_time += idle_enter ? ((idle_exit ? : now) - idle_enter) : 0;
 +      return sprintf(buf, "%llu\n", idle_time >> 12);
 +}
 +DEVICE_ATTR(idle_time_us, 0444, show_idle_time, NULL);
 +
 +cputime64_t arch_cpu_idle_time(int cpu)
 +{
 +      struct s390_idle_data *idle = &per_cpu(s390_idle, cpu);
 +      unsigned long long now, idle_enter, idle_exit;
 +      unsigned int sequence;
 +
 +      do {
 +              now = get_tod_clock();
 +              sequence = ACCESS_ONCE(idle->sequence);
 +              idle_enter = ACCESS_ONCE(idle->clock_idle_enter);
 +              idle_exit = ACCESS_ONCE(idle->clock_idle_exit);
 +      } while ((sequence & 1) || (ACCESS_ONCE(idle->sequence) != sequence));
 +      return idle_enter ? ((idle_exit ?: now) - idle_enter) : 0;
 +}
 +
 +void arch_cpu_idle_enter(void)
 +{
 +      local_mcck_disable();
 +}
 +
 +void arch_cpu_idle(void)
 +{
 +      if (!test_cpu_flag(CIF_MCCK_PENDING))
 +              /* Halt the cpu and keep track of cpu time accounting. */
 +              enabled_wait();
 +      local_irq_enable();
 +}
 +
 +void arch_cpu_idle_exit(void)
 +{
 +      local_mcck_enable();
 +      if (test_cpu_flag(CIF_MCCK_PENDING))
 +              s390_handle_mcck();
 +}
 +
 +void arch_cpu_idle_dead(void)
 +{
 +      cpu_die();
 +}

diff --cc arch/s390/kernel/kprobes.c
Simple merge

diff --cc arch/s390/kernel/nmi.c
Simple merge

diff --cc arch/s390/kernel/processor.c
index edefead,f0305b1..dbdd33e
--- 1/arch/s390/kernel/processor.c
--- 2/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@@ -23,7 -23,8 +23,7 @@@ static DEFINE_PER_CPU(struct cpuid, cpu
   */
  void cpu_init(void)
  {
-       struct cpuid *id = &__get_cpu_var(cpu_id);
 -      struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
+       struct cpuid *id = this_cpu_ptr(&cpu_id);
  
        get_cpu_id(id);
        atomic_inc(&init_mm.mm_count);

diff --cc arch/s390/kernel/time.c
Simple merge

diff --cc arch/sparc/kernel/perf_event.c
Simple merge

diff --cc arch/tile/kernel/smp.c
Simple merge

diff --cc arch/tile/kernel/time.c
Simple merge

diff --cc arch/tile/mm/init.c
Simple merge

diff --cc arch/x86/kernel/cpu/common.c
Simple merge

diff --cc arch/x86/kernel/cpu/perf_event.c
Simple merge

diff --cc arch/x86/kernel/cpu/perf_event_intel.c
Simple merge

diff --cc arch/x86/kernel/cpu/perf_event_intel_ds.c
Simple merge

diff --cc arch/x86/kernel/cpu/perf_event_intel_lbr.c
Simple merge

diff --cc arch/x86/kernel/kvm.c
Simple merge

diff --cc arch/x86/kvm/svm.c
Simple merge

diff --cc arch/x86/kvm/vmx.c
Simple merge

diff --cc arch/x86/kvm/x86.c
Simple merge

diff --cc arch/x86/xen/enlighten.c
Simple merge

diff --cc drivers/irqchip/irq-gic.c
Simple merge

diff --cc drivers/net/ethernet/tile/tilepro.c
Simple merge

diff --cc drivers/s390/cio/cio.c
index d5a6f28,dacdaaa..10eb738
--- 1/drivers/s390/cio/cio.c
--- 2/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@@ -561,9 -561,9 +561,9 @@@ static irqreturn_t do_cio_interrupt(in
        struct subchannel *sch;
        struct irb *irb;
  
 -      __this_cpu_write(s390_idle.nohz_delay, 1);
 +      set_cpu_flag(CIF_NOHZ_DELAY);
        tpi_info = (struct tpi_info *) &get_irq_regs()->int_code;
-       irb = &__get_cpu_var(cio_irb);
+       irb = this_cpu_ptr(&cio_irb);
        sch = (struct subchannel *)(unsigned long) tpi_info->intparm;
        if (!sch) {
                /* Clear pending interrupt condition. */

diff --cc fs/ext4/mballoc.c
Simple merge

diff --cc include/net/snmp.h
Simple merge

diff --cc kernel/events/callchain.c
Simple merge

diff --cc kernel/events/core.c
Simple merge

diff --cc kernel/irq/chip.c
Simple merge

diff --cc kernel/irq_work.c
index 385b85a,345d19e..3ab9048
--- 1/kernel/irq_work.c
--- 2/kernel/irq_work.c
+++ b/kernel/irq_work.c
@@@ -113,12 -113,10 +113,12 @@@ bool irq_work_needs_cpu(void
  {
        struct llist_head *raised, *lazy;
  
-       raised = &__get_cpu_var(raised_list);
-       lazy = &__get_cpu_var(lazy_list);
+       raised = this_cpu_ptr(&raised_list);
+       lazy = this_cpu_ptr(&lazy_list);
 -      if (llist_empty(raised) && llist_empty(lazy))
 -              return false;
 +
 +      if (llist_empty(raised) || arch_irq_work_has_interrupt())
 +              if (llist_empty(lazy))
 +                      return false;
  
        /* All work should have been flushed before going offline */
        WARN_ON_ONCE(cpu_is_offline(smp_processor_id()));

diff --cc kernel/printk/printk.c
Simple merge

diff --cc kernel/sched/deadline.c
Simple merge

diff --cc kernel/sched/fair.c
Simple merge

diff --cc kernel/sched/rt.c
Simple merge

diff --cc kernel/sched/sched.h
index 6130251,77d92f8..24156c8
--- 1/kernel/sched/sched.h
--- 2/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@@ -660,13 -647,13 +660,13 @@@ static inline int cpu_of(struct rq *rq
  #endif
  }
  
 -DECLARE_PER_CPU(struct rq, runqueues);
 +DECLARE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);
  
  #define cpu_rq(cpu)           (&per_cpu(runqueues, (cpu)))
- #define this_rq()             (&__get_cpu_var(runqueues))
+ #define this_rq()             this_cpu_ptr(&runqueues)
  #define task_rq(p)            cpu_rq(task_cpu(p))
  #define cpu_curr(cpu)         (cpu_rq(cpu)->curr)
- #define raw_rq()              (&__raw_get_cpu_var(runqueues))
+ #define raw_rq()              raw_cpu_ptr(&runqueues)
  
  static inline u64 rq_clock(struct rq *rq)
  {

diff --cc kernel/smp.c
Simple merge

diff --cc kernel/softirq.c
Simple merge

diff --cc kernel/time/hrtimer.c
Simple merge

diff --cc kernel/time/tick-common.c
Simple merge

diff --cc kernel/time/tick-sched.c
Simple merge

diff --cc kernel/time/timer.c
Simple merge

diff --cc kernel/watchdog.c
Simple merge

diff --cc net/core/dev.c
Simple merge

diff --cc net/core/skbuff.c
Simple merge

diff --cc net/ipv4/route.c
Simple merge

diff --cc net/ipv4/syncookies.c
Simple merge

diff --cc net/ipv4/tcp.c
Simple merge

diff --cc net/ipv4/tcp_output.c
Simple merge

diff --cc net/ipv6/syncookies.c
Simple merge