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xen: Use this_cpu_ops

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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>
This commit is contained in:
Christoph Lameter
2010-12-06 11:16:29 -06:00
committed by Tejun Heo
parent c7b92516a9
commit 780f36d8b3
5 changed files with 15 additions and 15 deletions
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8
arch/x86/xen/spinlock.c
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@ -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;