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percpu: Remove irqsafe_cpu_xxx variants

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We simply say that regular this_cpu use must be safe regardless of
preemption and interrupt state.  That has no material change for x86
and s390 implementations of this_cpu operations.  However, arches that
do not provide their own implementation for this_cpu operations will
now get code generated that disables interrupts instead of preemption.

-tj: This is part of on-going percpu API cleanup.  For detailed
     discussion of the subject, please refer to the following thread.

     http://thread.gmane.org/gmane.linux.kernel/1222078

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
LKML-Reference: <alpine.DEB.2.00.1112221154380.11787@router.home>
This commit is contained in:
Christoph Lameter 2011-12-22 11:58:51 -06:00 • committed by Tejun Heo
commit 933393f58f
9 changed files with 62 additions and 236 deletions
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4
include/linux/netdevice.h
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@ -2115,7 +2115,7 @@ extern void netdev_run_todo(void);
*/
static inline void dev_put(struct net_device *dev)
{
irqsafe_cpu_dec(*dev->pcpu_refcnt);
this_cpu_dec(*dev->pcpu_refcnt);
}
/**
@ -2126,7 +2126,7 @@ static inline void dev_put(struct net_device *dev)
*/
static inline void dev_hold(struct net_device *dev)
{
irqsafe_cpu_inc(*dev->pcpu_refcnt);
this_cpu_inc(*dev->pcpu_refcnt);
}
/* Carrier loss detection, dial on demand. The functions netif_carrier_on