x86: Replace __get_cpu_var uses

__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x).  This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.

Other use cases are for storing and retrieving data from the current
processors percpu area.  __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.

__get_cpu_var() is defined as :

#define __get_cpu_var(var) (*this_cpu_ptr(&(var)))

__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.

this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.

This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset.  Thereby address calculations are avoided and less registers
are used when code is generated.

Transformations done to __get_cpu_var()

1. Determine the address of the percpu instance of the current processor.

	DEFINE_PER_CPU(int, y);
	int *x = &__get_cpu_var(y);

    Converts to

	int *x = this_cpu_ptr(&y);

2. Same as #1 but this time an array structure is involved.

	DEFINE_PER_CPU(int, y[20]);
	int *x = __get_cpu_var(y);

    Converts to

	int *x = this_cpu_ptr(y);

3. Retrieve the content of the current processors instance of a per cpu
variable.

	DEFINE_PER_CPU(int, y);
	int x = __get_cpu_var(y)

   Converts to

	int x = __this_cpu_read(y);

4. Retrieve the content of a percpu struct

	DEFINE_PER_CPU(struct mystruct, y);
	struct mystruct x = __get_cpu_var(y);

   Converts to

	memcpy(&x, this_cpu_ptr(&y), sizeof(x));

5. Assignment to a per cpu variable

	DEFINE_PER_CPU(int, y)
	__get_cpu_var(y) = x;

   Converts to

	__this_cpu_write(y, x);

6. Increment/Decrement etc of a per cpu variable

	DEFINE_PER_CPU(int, y);
	__get_cpu_var(y)++

   Converts to

	__this_cpu_inc(y)

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

13 files changed, 89 insertions, 89 deletions

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index e4ab2b42bd6f..5666eb9568fc 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1198,9 +1198,9 @@ DEFINE_PER_CPU(int, debug_stack_usage);
 
 int is_debug_stack(unsigned long addr)
 {
-        return __get_cpu_var(debug_stack_usage) ||
-                (addr <= __get_cpu_var(debug_stack_addr) &&
-                 addr > (__get_cpu_var(debug_stack_addr) - DEBUG_STKSZ));
+        return __this_cpu_read(debug_stack_usage) ||
+                (addr <= __this_cpu_read(debug_stack_addr) &&
+                 addr > (__this_cpu_read(debug_stack_addr) - DEBUG_STKSZ));
 }
 NOKPROBE_SYMBOL(is_debug_stack);
 
diff --git a/arch/x86/kernel/cpu/mcheck/mce-inject.c b/arch/x86/kernel/cpu/mcheck/mce-inject.c
index 5ac2d1fb28bc..4cfba4371a71 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-inject.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-inject.c
@@ -83,7 +83,7 @@ static DEFINE_MUTEX(mce_inject_mutex);
 static int mce_raise_notify(unsigned int cmd, struct pt_regs *regs)
 {
         int cpu = smp_processor_id();
-        struct mce *m = &__get_cpu_var(injectm);
+        struct mce *m = this_cpu_ptr(&injectm);
         if (!cpumask_test_cpu(cpu, mce_inject_cpumask))
                 return NMI_DONE;
         cpumask_clear_cpu(cpu, mce_inject_cpumask);
@@ -97,7 +97,7 @@ static int mce_raise_notify(unsigned int cmd, struct pt_regs *regs)
 static void mce_irq_ipi(void *info)
 {
         int cpu = smp_processor_id();
-        struct mce *m = &__get_cpu_var(injectm);
+        struct mce *m = this_cpu_ptr(&injectm);
 
         if (cpumask_test_cpu(cpu, mce_inject_cpumask) &&
                         m->inject_flags & MCJ_EXCEPTION) {
@@ -109,7 +109,7 @@ static void mce_irq_ipi(void *info)
 /* Inject mce on current CPU */
 static int raise_local(void)
 {
-        struct mce *m = &__get_cpu_var(injectm);
+        struct mce *m = this_cpu_ptr(&injectm);
         int context = MCJ_CTX(m->inject_flags);
         int ret = 0;
         int cpu = m->extcpu;
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index bd9ccda8087f..61a9668cebfd 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -400,7 +400,7 @@ static u64 mce_rdmsrl(u32 msr)
 
                 if (offset < 0)
                         return 0;
-                return *(u64 *)((char *)&__get_cpu_var(injectm) + offset);
+                return *(u64 *)((char *)this_cpu_ptr(&injectm) + offset);
         }
 
         if (rdmsrl_safe(msr, &v)) {
@@ -422,7 +422,7 @@ static void mce_wrmsrl(u32 msr, u64 v)
                 int offset = msr_to_offset(msr);
 
                 if (offset >= 0)
-                        *(u64 *)((char *)&__get_cpu_var(injectm) + offset) = v;
+                        *(u64 *)((char *)this_cpu_ptr(&injectm) + offset) = v;
                 return;
         }
         wrmsrl(msr, v);
@@ -478,7 +478,7 @@ static DEFINE_PER_CPU(struct mce_ring, mce_ring);
 /* Runs with CPU affinity in workqueue */
 static int mce_ring_empty(void)
 {
-        struct mce_ring *r = &__get_cpu_var(mce_ring);
+        struct mce_ring *r = this_cpu_ptr(&mce_ring);
 
         return r->start == r->end;
 }
@@ -490,7 +490,7 @@ static int mce_ring_get(unsigned long *pfn)
 
         *pfn = 0;
         get_cpu();
-        r = &__get_cpu_var(mce_ring);
+        r = this_cpu_ptr(&mce_ring);
         if (r->start == r->end)
                 goto out;
         *pfn = r->ring[r->start];
@@ -504,7 +504,7 @@ out:
 /* Always runs in MCE context with preempt off */
 static int mce_ring_add(unsigned long pfn)
 {
-        struct mce_ring *r = &__get_cpu_var(mce_ring);
+        struct mce_ring *r = this_cpu_ptr(&mce_ring);
         unsigned next;
 
         next = (r->end + 1) % MCE_RING_SIZE;
@@ -526,7 +526,7 @@ int mce_available(struct cpuinfo_x86 *c)
 static void mce_schedule_work(void)
 {
         if (!mce_ring_empty())
-                schedule_work(&__get_cpu_var(mce_work));
+                schedule_work(this_cpu_ptr(&mce_work));
 }
 
 DEFINE_PER_CPU(struct irq_work, mce_irq_work);
@@ -551,7 +551,7 @@ static void mce_report_event(struct pt_regs *regs)
                 return;
         }
 
-        irq_work_queue(&__get_cpu_var(mce_irq_work));
+        irq_work_queue(this_cpu_ptr(&mce_irq_work));
 }
 
 /*
@@ -1045,7 +1045,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
 
         mce_gather_info(&m, regs);
 
-        final = &__get_cpu_var(mces_seen);
+        final = this_cpu_ptr(&mces_seen);
         *final = m;
 
         memset(valid_banks, 0, sizeof(valid_banks));
@@ -1278,22 +1278,22 @@ static unsigned long (*mce_adjust_timer)(unsigned long interval) =
 
 static int cmc_error_seen(void)
 {
-        unsigned long *v = &__get_cpu_var(mce_polled_error);
+        unsigned long *v = this_cpu_ptr(&mce_polled_error);
 
         return test_and_clear_bit(0, v);
 }
 
 static void mce_timer_fn(unsigned long data)
 {
-        struct timer_list *t = &__get_cpu_var(mce_timer);
+        struct timer_list *t = this_cpu_ptr(&mce_timer);
         unsigned long iv;
         int notify;
 
         WARN_ON(smp_processor_id() != data);
 
-        if (mce_available(__this_cpu_ptr(&cpu_info))) {
+        if (mce_available(this_cpu_ptr(&cpu_info))) {
                 machine_check_poll(MCP_TIMESTAMP,
-                                &__get_cpu_var(mce_poll_banks));
+                                this_cpu_ptr(&mce_poll_banks));
                 mce_intel_cmci_poll();
         }
 
@@ -1323,7 +1323,7 @@ static void mce_timer_fn(unsigned long data)
  */
 void mce_timer_kick(unsigned long interval)
 {
-        struct timer_list *t = &__get_cpu_var(mce_timer);
+        struct timer_list *t = this_cpu_ptr(&mce_timer);
         unsigned long when = jiffies + interval;
         unsigned long iv = __this_cpu_read(mce_next_interval);
 
@@ -1659,7 +1659,7 @@ static void mce_start_timer(unsigned int cpu, struct timer_list *t)
 
 static void __mcheck_cpu_init_timer(void)
 {
-        struct timer_list *t = &__get_cpu_var(mce_timer);
+        struct timer_list *t = this_cpu_ptr(&mce_timer);
         unsigned int cpu = smp_processor_id();
 
         setup_timer(t, mce_timer_fn, cpu);
@@ -1702,8 +1702,8 @@ void mcheck_cpu_init(struct cpuinfo_x86 *c)
         __mcheck_cpu_init_generic();
         __mcheck_cpu_init_vendor(c);
         __mcheck_cpu_init_timer();
-        INIT_WORK(&__get_cpu_var(mce_work), mce_process_work);
-        init_irq_work(&__get_cpu_var(mce_irq_work), &mce_irq_work_cb);
+        INIT_WORK(this_cpu_ptr(&mce_work), mce_process_work);
+        init_irq_work(this_cpu_ptr(&mce_irq_work), &mce_irq_work_cb);
 }
 
 /*
@@ -1955,7 +1955,7 @@ static struct miscdevice mce_chrdev_device = {
 static void __mce_disable_bank(void *arg)
 {
         int bank = *((int *)arg);
-        __clear_bit(bank, __get_cpu_var(mce_poll_banks));
+        __clear_bit(bank, this_cpu_ptr(mce_poll_banks));
         cmci_disable_bank(bank);
 }
 
@@ -2065,7 +2065,7 @@ static void mce_syscore_shutdown(void)
 static void mce_syscore_resume(void)
 {
         __mcheck_cpu_init_generic();
-        __mcheck_cpu_init_vendor(__this_cpu_ptr(&cpu_info));
+        __mcheck_cpu_init_vendor(raw_cpu_ptr(&cpu_info));
 }
 
 static struct syscore_ops mce_syscore_ops = {
@@ -2080,7 +2080,7 @@ static struct syscore_ops mce_syscore_ops = {
 
 static void mce_cpu_restart(void *data)
 {
-        if (!mce_available(__this_cpu_ptr(&cpu_info)))
+        if (!mce_available(raw_cpu_ptr(&cpu_info)))
                 return;
         __mcheck_cpu_init_generic();
         __mcheck_cpu_init_timer();
@@ -2096,14 +2096,14 @@ static void mce_restart(void)
 /* Toggle features for corrected errors */
 static void mce_disable_cmci(void *data)
 {
-        if (!mce_available(__this_cpu_ptr(&cpu_info)))
+        if (!mce_available(raw_cpu_ptr(&cpu_info)))
                 return;
         cmci_clear();
 }
 
 static void mce_enable_ce(void *all)
 {
-        if (!mce_available(__this_cpu_ptr(&cpu_info)))
+        if (!mce_available(raw_cpu_ptr(&cpu_info)))
                 return;
         cmci_reenable();
         cmci_recheck();
@@ -2336,7 +2336,7 @@ static void mce_disable_cpu(void *h)
         unsigned long action = *(unsigned long *)h;
         int i;
 
-        if (!mce_available(__this_cpu_ptr(&cpu_info)))
+        if (!mce_available(raw_cpu_ptr(&cpu_info)))
                 return;
 
         if (!(action & CPU_TASKS_FROZEN))
@@ -2354,7 +2354,7 @@ static void mce_reenable_cpu(void *h)
         unsigned long action = *(unsigned long *)h;
         int i;
 
-        if (!mce_available(__this_cpu_ptr(&cpu_info)))
+        if (!mce_available(raw_cpu_ptr(&cpu_info)))
                 return;
 
         if (!(action & CPU_TASKS_FROZEN))
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index 1e49f8f41276..5d4999f95aec 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -310,7 +310,7 @@ static void amd_threshold_interrupt(void)
                          * event.
                          */
                         machine_check_poll(MCP_TIMESTAMP,
-                                        &__get_cpu_var(mce_poll_banks));
+                                        this_cpu_ptr(&mce_poll_banks));
 
                         if (high & MASK_OVERFLOW_HI) {
                                 rdmsrl(address, m.misc);
diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel.c b/arch/x86/kernel/cpu/mcheck/mce_intel.c
index 3bdb95ae8c43..b3c97bafc123 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_intel.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_intel.c
@@ -86,7 +86,7 @@ void mce_intel_cmci_poll(void)
 {
         if (__this_cpu_read(cmci_storm_state) == CMCI_STORM_NONE)
                 return;
-        machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
+        machine_check_poll(MCP_TIMESTAMP, this_cpu_ptr(&mce_banks_owned));
 }
 
 void mce_intel_hcpu_update(unsigned long cpu)
@@ -145,7 +145,7 @@ static void cmci_storm_disable_banks(void)
         u64 val;
 
         raw_spin_lock_irqsave(&cmci_discover_lock, flags);
-        owned = __get_cpu_var(mce_banks_owned);
+        owned = this_cpu_ptr(mce_banks_owned);
         for_each_set_bit(bank, owned, MAX_NR_BANKS) {
                 rdmsrl(MSR_IA32_MCx_CTL2(bank), val);
                 val &= ~MCI_CTL2_CMCI_EN;
@@ -195,7 +195,7 @@ static void intel_threshold_interrupt(void)
 {
         if (cmci_storm_detect())
                 return;
-        machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
+        machine_check_poll(MCP_TIMESTAMP, this_cpu_ptr(&mce_banks_owned));
         mce_notify_irq();
 }
 
@@ -206,7 +206,7 @@ static void intel_threshold_interrupt(void)
  */
 static void cmci_discover(int banks)
 {
-        unsigned long *owned = (void *)&__get_cpu_var(mce_banks_owned);
+        unsigned long *owned = (void *)this_cpu_ptr(&mce_banks_owned);
         unsigned long flags;
         int i;
         int bios_wrong_thresh = 0;
@@ -228,7 +228,7 @@ static void cmci_discover(int banks)
                 /* Already owned by someone else? */
                 if (val & MCI_CTL2_CMCI_EN) {
                         clear_bit(i, owned);
-                        __clear_bit(i, __get_cpu_var(mce_poll_banks));
+                        __clear_bit(i, this_cpu_ptr(mce_poll_banks));
                         continue;
                 }
 
@@ -252,7 +252,7 @@ static void cmci_discover(int banks)
                 /* Did the enable bit stick? -- the bank supports CMCI */
                 if (val & MCI_CTL2_CMCI_EN) {
                         set_bit(i, owned);
-                        __clear_bit(i, __get_cpu_var(mce_poll_banks));
+                        __clear_bit(i, this_cpu_ptr(mce_poll_banks));
                         /*
                          * We are able to set thresholds for some banks that
                          * had a threshold of 0. This means the BIOS has not
@@ -263,7 +263,7 @@ static void cmci_discover(int banks)
                                         (val & MCI_CTL2_CMCI_THRESHOLD_MASK))
                                 bios_wrong_thresh = 1;
                 } else {
-                        WARN_ON(!test_bit(i, __get_cpu_var(mce_poll_banks)));
+                        WARN_ON(!test_bit(i, this_cpu_ptr(mce_poll_banks)));
                 }
         }
         raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
@@ -284,10 +284,10 @@ void cmci_recheck(void)
         unsigned long flags;
         int banks;
 
-        if (!mce_available(__this_cpu_ptr(&cpu_info)) || !cmci_supported(&banks))
+        if (!mce_available(raw_cpu_ptr(&cpu_info)) || !cmci_supported(&banks))
                 return;
         local_irq_save(flags);
-        machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
+        machine_check_poll(MCP_TIMESTAMP, this_cpu_ptr(&mce_banks_owned));
         local_irq_restore(flags);
 }
 
@@ -296,12 +296,12 @@ static void __cmci_disable_bank(int bank)
 {
         u64 val;
 
-        if (!test_bit(bank, __get_cpu_var(mce_banks_owned)))
+        if (!test_bit(bank, this_cpu_ptr(mce_banks_owned)))
                 return;
         rdmsrl(MSR_IA32_MCx_CTL2(bank), val);
         val &= ~MCI_CTL2_CMCI_EN;
         wrmsrl(MSR_IA32_MCx_CTL2(bank), val);
-        __clear_bit(bank, __get_cpu_var(mce_banks_owned));
+        __clear_bit(bank, this_cpu_ptr(mce_banks_owned));
 }
 
 /*
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 2879ecdaac43..5cd2b7967370 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -487,7 +487,7 @@ static int __x86_pmu_event_init(struct perf_event *event)
 
 void x86_pmu_disable_all(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         int idx;
 
         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
@@ -505,7 +505,7 @@ void x86_pmu_disable_all(void)
 
 static void x86_pmu_disable(struct pmu *pmu)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (!x86_pmu_initialized())
                 return;
@@ -522,7 +522,7 @@ static void x86_pmu_disable(struct pmu *pmu)
 
 void x86_pmu_enable_all(int added)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         int idx;
 
         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
@@ -869,7 +869,7 @@ static void x86_pmu_start(struct perf_event *event, int flags);
 
 static void x86_pmu_enable(struct pmu *pmu)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct perf_event *event;
         struct hw_perf_event *hwc;
         int i, added = cpuc->n_added;
@@ -1020,7 +1020,7 @@ void x86_pmu_enable_event(struct perf_event *event)
  */
 static int x86_pmu_add(struct perf_event *event, int flags)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct hw_perf_event *hwc;
         int assign[X86_PMC_IDX_MAX];
         int n, n0, ret;
@@ -1071,7 +1071,7 @@ out:
 
 static void x86_pmu_start(struct perf_event *event, int flags)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         int idx = event->hw.idx;
 
         if (WARN_ON_ONCE(!(event->hw.state & PERF_HES_STOPPED)))
@@ -1150,7 +1150,7 @@ void perf_event_print_debug(void)
 
 void x86_pmu_stop(struct perf_event *event, int flags)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct hw_perf_event *hwc = &event->hw;
 
         if (__test_and_clear_bit(hwc->idx, cpuc->active_mask)) {
@@ -1172,7 +1172,7 @@ void x86_pmu_stop(struct perf_event *event, int flags)
 
 static void x86_pmu_del(struct perf_event *event, int flags)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         int i;
 
         /*
@@ -1227,7 +1227,7 @@ int x86_pmu_handle_irq(struct pt_regs *regs)
         int idx, handled = 0;
         u64 val;
 
-        cpuc = &__get_cpu_var(cpu_hw_events);
+        cpuc = this_cpu_ptr(&cpu_hw_events);
 
         /*
          * Some chipsets need to unmask the LVTPC in a particular spot
@@ -1636,7 +1636,7 @@ static void x86_pmu_cancel_txn(struct pmu *pmu)
  */
 static int x86_pmu_commit_txn(struct pmu *pmu)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         int assign[X86_PMC_IDX_MAX];
         int n, ret;
 
@@ -1995,7 +1995,7 @@ static unsigned long get_segment_base(unsigned int segment)
                 if (idx > GDT_ENTRIES)
                         return 0;
 
-                desc = __this_cpu_ptr(&gdt_page.gdt[0]);
+                desc = raw_cpu_ptr(gdt_page.gdt);
         }
 
         return get_desc_base(desc + idx);
diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index beeb7cc07044..28926311aac1 100644
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -699,7 +699,7 @@ __init int amd_pmu_init(void)
 
 void amd_pmu_enable_virt(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         cpuc->perf_ctr_virt_mask = 0;
 
@@ -711,7 +711,7 @@ EXPORT_SYMBOL_GPL(amd_pmu_enable_virt);
 
 void amd_pmu_disable_virt(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         /*
          * We only mask out the Host-only bit so that host-only counting works
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 2502d0d9d246..6f80accf137d 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1045,7 +1045,7 @@ static inline bool intel_pmu_needs_lbr_smpl(struct perf_event *event)
 
 static void intel_pmu_disable_all(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
 
@@ -1058,7 +1058,7 @@ static void intel_pmu_disable_all(void)
 
 static void intel_pmu_enable_all(int added)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         intel_pmu_pebs_enable_all();
         intel_pmu_lbr_enable_all();
@@ -1092,7 +1092,7 @@ static void intel_pmu_enable_all(int added)
  */
 static void intel_pmu_nhm_workaround(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         static const unsigned long nhm_magic[4] = {
                 0x4300B5,
                 0x4300D2,
@@ -1191,7 +1191,7 @@ static inline bool event_is_checkpointed(struct perf_event *event)
 static void intel_pmu_disable_event(struct perf_event *event)
 {
         struct hw_perf_event *hwc = &event->hw;
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (unlikely(hwc->idx == INTEL_PMC_IDX_FIXED_BTS)) {
                 intel_pmu_disable_bts();
@@ -1255,7 +1255,7 @@ static void intel_pmu_enable_fixed(struct hw_perf_event *hwc)
 static void intel_pmu_enable_event(struct perf_event *event)
 {
         struct hw_perf_event *hwc = &event->hw;
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (unlikely(hwc->idx == INTEL_PMC_IDX_FIXED_BTS)) {
                 if (!__this_cpu_read(cpu_hw_events.enabled))
@@ -1349,7 +1349,7 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
         u64 status;
         int handled;
 
-        cpuc = &__get_cpu_var(cpu_hw_events);
+        cpuc = this_cpu_ptr(&cpu_hw_events);
 
         /*
          * No known reason to not always do late ACK,
@@ -1781,7 +1781,7 @@ EXPORT_SYMBOL_GPL(perf_guest_get_msrs);
 
 static struct perf_guest_switch_msr *intel_guest_get_msrs(int *nr)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct perf_guest_switch_msr *arr = cpuc->guest_switch_msrs;
 
         arr[0].msr = MSR_CORE_PERF_GLOBAL_CTRL;
@@ -1802,7 +1802,7 @@ static struct perf_guest_switch_msr *intel_guest_get_msrs(int *nr)
 
 static struct perf_guest_switch_msr *core_guest_get_msrs(int *nr)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct perf_guest_switch_msr *arr = cpuc->guest_switch_msrs;
         int idx;
 
@@ -1836,7 +1836,7 @@ static void core_pmu_enable_event(struct perf_event *event)
 
 static void core_pmu_enable_all(int added)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         int idx;
 
         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index 696ade311ded..7b786b369789 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -475,7 +475,7 @@ void intel_pmu_enable_bts(u64 config)
 
 void intel_pmu_disable_bts(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         unsigned long debugctlmsr;
 
         if (!cpuc->ds)
@@ -492,7 +492,7 @@ void intel_pmu_disable_bts(void)
 
 int intel_pmu_drain_bts_buffer(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct debug_store *ds = cpuc->ds;
         struct bts_record {
                 u64     from;
@@ -712,7 +712,7 @@ struct event_constraint *intel_pebs_constraints(struct perf_event *event)
 
 void intel_pmu_pebs_enable(struct perf_event *event)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct hw_perf_event *hwc = &event->hw;
 
         hwc->config &= ~ARCH_PERFMON_EVENTSEL_INT;
@@ -727,7 +727,7 @@ void intel_pmu_pebs_enable(struct perf_event *event)
 
 void intel_pmu_pebs_disable(struct perf_event *event)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct hw_perf_event *hwc = &event->hw;
 
         cpuc->pebs_enabled &= ~(1ULL << hwc->idx);
@@ -745,7 +745,7 @@ void intel_pmu_pebs_disable(struct perf_event *event)
 
 void intel_pmu_pebs_enable_all(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (cpuc->pebs_enabled)
                 wrmsrl(MSR_IA32_PEBS_ENABLE, cpuc->pebs_enabled);
@@ -753,7 +753,7 @@ void intel_pmu_pebs_enable_all(void)
 
 void intel_pmu_pebs_disable_all(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (cpuc->pebs_enabled)
                 wrmsrl(MSR_IA32_PEBS_ENABLE, 0);
@@ -761,7 +761,7 @@ void intel_pmu_pebs_disable_all(void)
 
 static int intel_pmu_pebs_fixup_ip(struct pt_regs *regs)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         unsigned long from = cpuc->lbr_entries[0].from;
         unsigned long old_to, to = cpuc->lbr_entries[0].to;
         unsigned long ip = regs->ip;
@@ -868,7 +868,7 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
          * We cast to the biggest pebs_record but are careful not to
          * unconditionally access the 'extra' entries.
          */
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct pebs_record_hsw *pebs = __pebs;
         struct perf_sample_data data;
         struct pt_regs regs;
@@ -957,7 +957,7 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
 
 static void intel_pmu_drain_pebs_core(struct pt_regs *iregs)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct debug_store *ds = cpuc->ds;
         struct perf_event *event = cpuc->events[0]; /* PMC0 only */
         struct pebs_record_core *at, *top;
@@ -998,7 +998,7 @@ static void intel_pmu_drain_pebs_core(struct pt_regs *iregs)
 
 static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         struct debug_store *ds = cpuc->ds;
         struct perf_event *event = NULL;
         void *at, *top;
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index 9dd2459a4c73..ebb0d3144551 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -133,7 +133,7 @@ static void intel_pmu_lbr_filter(struct cpu_hw_events *cpuc);
 static void __intel_pmu_lbr_enable(void)
 {
         u64 debugctl;
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (cpuc->lbr_sel)
                 wrmsrl(MSR_LBR_SELECT, cpuc->lbr_sel->config);
@@ -183,7 +183,7 @@ void intel_pmu_lbr_reset(void)
 
 void intel_pmu_lbr_enable(struct perf_event *event)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (!x86_pmu.lbr_nr)
                 return;
@@ -203,7 +203,7 @@ void intel_pmu_lbr_enable(struct perf_event *event)
 
 void intel_pmu_lbr_disable(struct perf_event *event)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (!x86_pmu.lbr_nr)
                 return;
@@ -220,7 +220,7 @@ void intel_pmu_lbr_disable(struct perf_event *event)
 
 void intel_pmu_lbr_enable_all(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (cpuc->lbr_users)
                 __intel_pmu_lbr_enable();
@@ -228,7 +228,7 @@ void intel_pmu_lbr_enable_all(void)
 
 void intel_pmu_lbr_disable_all(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (cpuc->lbr_users)
                 __intel_pmu_lbr_disable();
@@ -332,7 +332,7 @@ static void intel_pmu_lbr_read_64(struct cpu_hw_events *cpuc)
 
 void intel_pmu_lbr_read(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 
         if (!cpuc->lbr_users)
                 return;
diff --git a/arch/x86/kernel/cpu/perf_event_intel_rapl.c b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
index 619f7699487a..d64f275fe274 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_rapl.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
@@ -135,7 +135,7 @@ static inline u64 rapl_scale(u64 v)
          * or use ldexp(count, -32).
          * Watts = Joules/Time delta
          */
-        return v << (32 - __get_cpu_var(rapl_pmu)->hw_unit);
+        return v << (32 - __this_cpu_read(rapl_pmu->hw_unit));
 }
 
 static u64 rapl_event_update(struct perf_event *event)
@@ -187,7 +187,7 @@ static void rapl_stop_hrtimer(struct rapl_pmu *pmu)
 
 static enum hrtimer_restart rapl_hrtimer_handle(struct hrtimer *hrtimer)
 {
-        struct rapl_pmu *pmu = __get_cpu_var(rapl_pmu);
+        struct rapl_pmu *pmu = __this_cpu_read(rapl_pmu);
         struct perf_event *event;
         unsigned long flags;
 
@@ -234,7 +234,7 @@ static void __rapl_pmu_event_start(struct rapl_pmu *pmu,
 
 static void rapl_pmu_event_start(struct perf_event *event, int mode)
 {
-        struct rapl_pmu *pmu = __get_cpu_var(rapl_pmu);
+        struct rapl_pmu *pmu = __this_cpu_read(rapl_pmu);
         unsigned long flags;
 
         spin_lock_irqsave(&pmu->lock, flags);
@@ -244,7 +244,7 @@ static void rapl_pmu_event_start(struct perf_event *event, int mode)
 
 static void rapl_pmu_event_stop(struct perf_event *event, int mode)
 {
-        struct rapl_pmu *pmu = __get_cpu_var(rapl_pmu);
+        struct rapl_pmu *pmu = __this_cpu_read(rapl_pmu);
         struct hw_perf_event *hwc = &event->hw;
         unsigned long flags;
 
@@ -278,7 +278,7 @@ static void rapl_pmu_event_stop(struct perf_event *event, int mode)
 
 static int rapl_pmu_event_add(struct perf_event *event, int mode)
 {
-        struct rapl_pmu *pmu = __get_cpu_var(rapl_pmu);
+        struct rapl_pmu *pmu = __this_cpu_read(rapl_pmu);
         struct hw_perf_event *hwc = &event->hw;
         unsigned long flags;
 
@@ -696,7 +696,7 @@ static int __init rapl_pmu_init(void)
                 return -1;
         }
 
-        pmu = __get_cpu_var(rapl_pmu);
+        pmu = __this_cpu_read(rapl_pmu);
 
         pr_info("RAPL PMU detected, hw unit 2^-%d Joules,"
                 " API unit is 2^-32 Joules,"
diff --git a/arch/x86/kernel/cpu/perf_event_knc.c b/arch/x86/kernel/cpu/perf_event_knc.c
index 838fa8772c62..5b0c232d1ee6 100644
--- a/arch/x86/kernel/cpu/perf_event_knc.c
+++ b/arch/x86/kernel/cpu/perf_event_knc.c
@@ -217,7 +217,7 @@ static int knc_pmu_handle_irq(struct pt_regs *regs)
         int bit, loops;
         u64 status;
 
-        cpuc = &__get_cpu_var(cpu_hw_events);
+        cpuc = this_cpu_ptr(&cpu_hw_events);
 
         knc_pmu_disable_all();
 
diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c
index 5d466b7d8609..f2e56783af3d 100644
--- a/arch/x86/kernel/cpu/perf_event_p4.c
+++ b/arch/x86/kernel/cpu/perf_event_p4.c
@@ -915,7 +915,7 @@ static inline void p4_pmu_disable_event(struct perf_event *event)
 
 static void p4_pmu_disable_all(void)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         int idx;
 
         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
@@ -984,7 +984,7 @@ static void p4_pmu_enable_event(struct perf_event *event)
 
 static void p4_pmu_enable_all(int added)
 {
-        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+        struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
         int idx;
 
         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
@@ -1004,7 +1004,7 @@ static int p4_pmu_handle_irq(struct pt_regs *regs)
         int idx, handled = 0;
         u64 val;
 
-        cpuc = &__get_cpu_var(cpu_hw_events);
+        cpuc = this_cpu_ptr(&cpu_hw_events);
 
         for (idx = 0; idx < x86_pmu.num_counters; idx++) {
                 int overflow;