xen: Use this_cpu_ops

Use this_cpu_ops to reduce code size and simplify things in various places.

V3->V4:
	Move instance of this_cpu_inc_return to a later patchset so that
	this patch can be applied without infrastructure changes.

Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

4 files changed, 11 insertions, 11 deletions

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 44dcad43989d..aa8c89ae54cf 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -574,8 +574,8 @@ static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
 
         preempt_disable();
 
-        start = __get_cpu_var(idt_desc).address;
-        end = start + __get_cpu_var(idt_desc).size + 1;
+        start = __this_cpu_read(idt_desc.address);
+        end = start + __this_cpu_read(idt_desc.size) + 1;
 
         xen_mc_flush();
 
diff --git a/arch/x86/xen/multicalls.h b/arch/x86/xen/multicalls.h
index 9e565da5d1f7..4ec8035e3216 100644
--- a/arch/x86/xen/multicalls.h
+++ b/arch/x86/xen/multicalls.h
@@ -22,7 +22,7 @@ static inline void xen_mc_batch(void)
         unsigned long flags;
         /* need to disable interrupts until this entry is complete */
         local_irq_save(flags);
-        __get_cpu_var(xen_mc_irq_flags) = flags;
+        __this_cpu_write(xen_mc_irq_flags, flags);
 }
 
 static inline struct multicall_space xen_mc_entry(size_t args)
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index 23e061b9327b..cc9b1e182fcf 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
@@ -159,8 +159,8 @@ static inline struct xen_spinlock *spinning_lock(struct xen_spinlock *xl)
 {
         struct xen_spinlock *prev;
 
-        prev = __get_cpu_var(lock_spinners);
-        __get_cpu_var(lock_spinners) = xl;
+        prev = __this_cpu_read(lock_spinners);
+        __this_cpu_write(lock_spinners, xl);
 
         wmb();                  /* set lock of interest before count */
 
@@ -179,14 +179,14 @@ static inline void unspinning_lock(struct xen_spinlock *xl, struct xen_spinlock
         asm(LOCK_PREFIX " decw %0"
             : "+m" (xl->spinners) : : "memory");
         wmb();                  /* decrement count before restoring lock */
-        __get_cpu_var(lock_spinners) = prev;
+        __this_cpu_write(lock_spinners, prev);
 }
 
 static noinline int xen_spin_lock_slow(struct arch_spinlock *lock, bool irq_enable)
 {
         struct xen_spinlock *xl = (struct xen_spinlock *)lock;
         struct xen_spinlock *prev;
-        int irq = __get_cpu_var(lock_kicker_irq);
+        int irq = __this_cpu_read(lock_kicker_irq);
         int ret;
         u64 start;
 
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index b2bb5aa3b054..ef8930f51b09 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -135,24 +135,24 @@ static void do_stolen_accounting(void)
 
         /* Add the appropriate number of ticks of stolen time,
            including any left-overs from last time. */
-        stolen = runnable + offline + __get_cpu_var(xen_residual_stolen);
+        stolen = runnable + offline + __this_cpu_read(xen_residual_stolen);
 
         if (stolen < 0)
                 stolen = 0;
 
         ticks = iter_div_u64_rem(stolen, NS_PER_TICK, &stolen);
-        __get_cpu_var(xen_residual_stolen) = stolen;
+        __this_cpu_write(xen_residual_stolen, stolen);
         account_steal_ticks(ticks);
 
         /* Add the appropriate number of ticks of blocked time,
            including any left-overs from last time. */
-        blocked += __get_cpu_var(xen_residual_blocked);
+        blocked += __this_cpu_read(xen_residual_blocked);
 
         if (blocked < 0)
                 blocked = 0;
 
         ticks = iter_div_u64_rem(blocked, NS_PER_TICK, &blocked);
-        __get_cpu_var(xen_residual_blocked) = blocked;
+        __this_cpu_write(xen_residual_blocked, blocked);
         account_idle_ticks(ticks);
 }