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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 <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
LKML-Reference: <[email protected]>
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
net/caif/caif_dev.c
View file

@ -69,12 +69,12 @@ static struct caif_device_entry_list *caif_device_list(struct net *net)
static void caifd_put(struct caif_device_entry *e)
{
irqsafe_cpu_dec(*e->pcpu_refcnt);
this_cpu_dec(*e->pcpu_refcnt);
}
static void caifd_hold(struct caif_device_entry *e)
{
irqsafe_cpu_inc(*e->pcpu_refcnt);
this_cpu_inc(*e->pcpu_refcnt);
}
static int caifd_refcnt_read(struct caif_device_entry *e)

4
net/caif/cffrml.c
View file

@ -177,14 +177,14 @@ void cffrml_put(struct cflayer *layr)
{
struct cffrml *this = container_obj(layr);
if (layr != NULL && this->pcpu_refcnt != NULL)
irqsafe_cpu_dec(*this->pcpu_refcnt);
this_cpu_dec(*this->pcpu_refcnt);
}
void cffrml_hold(struct cflayer *layr)
{
struct cffrml *this = container_obj(layr);
if (layr != NULL && this->pcpu_refcnt != NULL)
irqsafe_cpu_inc(*this->pcpu_refcnt);
this_cpu_inc(*this->pcpu_refcnt);
}
int cffrml_refcnt_read(struct cflayer *layr)