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net: Add initial_ref arg to dst_alloc().

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This allows avoiding multiple writes to the initial __refcnt.

The most simplest cases of wanting an initial reference of "1"
in ipv4 and ipv6 have been converted, the rest have been left
along and kept at the existing "0".

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2011-02-16 14:08:44 -08:00
parent 0c4dcd58fd
commit 3c7bd1a140
6 changed files with 10 additions and 14 deletions
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4
net/core/dst.c
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@ -166,7 +166,7 @@ EXPORT_SYMBOL(dst_discard);
const u32 dst_default_metrics[RTAX_MAX];
void *dst_alloc(struct dst_ops *ops)
void *dst_alloc(struct dst_ops *ops, int initial_ref)
{
struct dst_entry *dst;
@ -177,7 +177,7 @@ void *dst_alloc(struct dst_ops *ops)
dst = kmem_cache_zalloc(ops->kmem_cachep, GFP_ATOMIC);
if (!dst)
return NULL;
atomic_set(&dst->__refcnt, 0);
atomic_set(&dst->__refcnt, initial_ref);
dst->ops = ops;
dst->lastuse = jiffies;
dst->path = dst;