net/netlink/af_netlink.c:545:6: sparse: symbol 'netlink_ring_setup_skb'

Hi Patrick,

There are new sparse warnings show up in

tree:   git://150.214.188.80/nf-next mmap-netlink
head:   c7e7243d0b69e2323dde057c28f1102d00e5a3c6
commit: 23c9e8b9464cfbf148b3ba911f5a67b16bc94aa8 [62/68] netlink: add mmap'ed netlink helper functions

All sparse warnings:

net/netlink/af_netlink.c:201:39: sparse: incorrect type in return expression (different modifiers)
net/netlink/af_netlink.c:201:39: expected struct page [pure] *
net/netlink/af_netlink.c:201:39: got struct page *
net/netlink/af_netlink.c:203:24: sparse: incorrect type in return expression (different modifiers)
net/netlink/af_netlink.c:203:24: expected struct page [pure] *
net/netlink/af_netlink.c:203:24: got struct page *
net/netlink/af_netlink.c:404:38: sparse: incorrect type in assignment (different modifiers)
net/netlink/af_netlink.c:404:38: expected struct page *page
net/netlink/af_netlink.c:404:38: got struct page [pure] *
+ net/netlink/af_netlink.c:545:6: sparse: symbol 'netlink_ring_setup_skb' was not declared. Should it be static? net/netlink/af_netlink.c:999:56: sparse: incorrect type in argument 1 (different address spaces)
net/netlink/af_netlink.c:999:56: expected void const *<noident>
net/netlink/af_netlink.c:999:56: got struct listeners [noderef] <asn:4>*listeners
net/netlink/af_netlink.c:812:38: sparse: dereference of noderef expression net/netlink/af_netlink.c:422:13: warning: 'netlink_frame_flush_dcache' defined but not used [-Wunused-function]

vim +545 net/netlink/af_netlink.c
542 return (struct nl_mmap_hdr *)(skb->head - NL_MMAP_HDRLEN);
543 }
544

546 struct netlink_ring *ring, struct nl_mmap_hdr *hdr)
547 {
548 unsigned int size;

Please consider folding the attached diff :-)

---
0-DAY kernel build testing backend Open Source Technology Centre
Fengguang Wu <[email protected]> Intel Corporation

index 801eeec..a64011d 100644
@@ -542,7 +542,7 @@ static struct nl_mmap_hdr *netlink_mmap_hdr(struct sk_buff *skb)
 	return (struct nl_mmap_hdr *)(skb->head - NL_MMAP_HDRLEN);
 }
 
-void netlink_ring_setup_skb(struct sk_buff *skb, struct sock *sk,
+static void netlink_ring_setup_skb(struct sk_buff *skb, struct sock *sk,
 			    struct netlink_ring *ring, struct nl_mmap_hdr *hdr)
 {
 	unsigned int size;