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net: rds: use this_cpu_* per-cpu helper

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Signed-off-by: Shan Wei <davidshan@tencent.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shan Wei 2012-11-12 15:52:01 +00:00 • committed by David S. Miller
commit ae4b46e9d7
2 changed files with 14 additions and 12 deletions
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2
net/rds/ib.h
View file

@ -50,7 +50,7 @@ struct rds_ib_cache_head {
};
struct rds_ib_refill_cache {
struct rds_ib_cache_head *percpu;
struct rds_ib_cache_head __percpu *percpu;
struct list_head *xfer;
struct list_head *ready;
};

24
net/rds/ib_recv.c
View file

@ -418,20 +418,21 @@ static void rds_ib_recv_cache_put(struct list_head *new_item,
struct rds_ib_refill_cache *cache)
{
unsigned long flags;
struct rds_ib_cache_head *chp;
struct list_head *old;
struct list_head __percpu *chpfirst;
local_irq_save(flags);
chp = per_cpu_ptr(cache->percpu, smp_processor_id());
if (!chp->first)
chpfirst = __this_cpu_read(cache->percpu->first);
if (!chpfirst)
INIT_LIST_HEAD(new_item);
else /* put on front */
list_add_tail(new_item, chp->first);
chp->first = new_item;
chp->count++;
list_add_tail(new_item, chpfirst);
if (chp->count < RDS_IB_RECYCLE_BATCH_COUNT)
__this_cpu_write(chpfirst, new_item);
__this_cpu_inc(cache->percpu->count);
if (__this_cpu_read(cache->percpu->count) < RDS_IB_RECYCLE_BATCH_COUNT)
goto end;
/*
@ -443,12 +444,13 @@ static void rds_ib_recv_cache_put(struct list_head *new_item,
do {
old = xchg(&cache->xfer, NULL);
if (old)
list_splice_entire_tail(old, chp->first);
old = cmpxchg(&cache->xfer, NULL, chp->first);
list_splice_entire_tail(old, chpfirst);
old = cmpxchg(&cache->xfer, NULL, chpfirst);
} while (old);
chp->first = NULL;
chp->count = 0;
__this_cpu_write(chpfirst, NULL);
__this_cpu_write(cache->percpu->count, 0);
end:
local_irq_restore(flags);
}