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authorChristoph Lameter <cl@linux.com>2010-12-06 20:16:29 +0300
committerTejun Heo <tj@kernel.org>2010-12-17 17:07:19 +0300
commit780f36d8b3fa9572f731d4fb85067b2e45e6f993 (patch)
tree26c2f80122cd863232de2e295e8435f06c9e2527 /arch/x86/xen/spinlock.c
parentc7b92516a9c68fa5403879225a5a19974a801ef6 (diff)
downloadlinux-780f36d8b3fa9572f731d4fb85067b2e45e6f993.tar.xz
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>
Diffstat (limited to 'arch/x86/xen/spinlock.c')
-rw-r--r--arch/x86/xen/spinlock.c8
1 files changed, 4 insertions, 4 deletions
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;