[ICMP]: Avoid sparse warnings in net/ipv4/icmp.c

[Eric Dumazet <dada1@cosmosbay.com>]

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   CHECK   net/ipv4/icmp.c
net/ipv4/icmp.c:249:13: warning: context imbalance in 'icmp_xmit_unlock' - 
unexpected unlock
net/ipv4/icmp.c:376:13: warning: context imbalance in 'icmp_reply' - different 
lock contexts for basic block
net/ipv4/icmp.c:430:6: warning: context imbalance in 'icmp_send' - different 
lock contexts for basic block

Solution is to declare icmp_xmit_unlock() as __inline__ (similar with 
icmp_xmit_lock())

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>

  net/ipv4/icmp.c |    2 +-
  1 files changed, 1 insertion(+), 1 deletion(-)


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diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index fc66c8a..01ce07b 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -246,7 +246,7 @@ static __inline__ int icmp_xmit_lock(void)
 	return 0;
 }
 
-static void icmp_xmit_unlock(void)
+static __inline__ void icmp_xmit_unlock(void)
 {
 	spin_unlock_bh(&icmp_sock->sk_lock.slock);
 }