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authorWANG Cong <xiyou.wangcong@gmail.com>2017-07-12 15:56:41 -0700
committerDavid S. Miller <davem@davemloft.net>2017-07-14 08:16:59 -0700
commit230cd1279d0019d52f9529c7d91c96d095cae755 (patch)
tree9b68a605129c05297400fbb03befc95532454fc8 /net
parent2b02c20ce0c28974b44e69a2e2f5ddc6a470ad6f (diff)
downloadlinux-230cd1279d0019d52f9529c7d91c96d095cae755.tar.bz2
netpoll: shut up a kernel warning on refcount
When we convert atomic_t to refcount_t, a new kernel warning on "increment on 0" is introduced in the netpoll code, zap_completion_queue(). In fact for this special case, we know the refcount is 0 and we just have to set it to 1 to satisfy the following dev_kfree_skb_any(), so we can just use refcount_set(..., 1) instead. Fixes: 633547973ffc ("net: convert sk_buff.users from atomic_t to refcount_t") Reported-by: Dave Jones <davej@codemonkey.org.uk> Cc: Reshetova, Elena <elena.reshetova@intel.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/netpoll.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index d3408a693166..8357f164c660 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -277,7 +277,7 @@ static void zap_completion_queue(void)
struct sk_buff *skb = clist;
clist = clist->next;
if (!skb_irq_freeable(skb)) {
- refcount_inc(&skb->users);
+ refcount_set(&skb->users, 1);
dev_kfree_skb_any(skb); /* put this one back */
} else {
__kfree_skb(skb);