[IPV4]: fib_trie initialzation fix
In some kernel configs /proc functions seems to be accessed before the trie is initialized. The patch below checks for this. Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -50,7 +50,7 @@
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* Patrick McHardy <kaber@trash.net>
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*/
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#define VERSION "0.404"
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#define VERSION "0.405"
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#include <linux/config.h>
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#include <asm/uaccess.h>
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@ -2040,7 +2040,15 @@ rescan:
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static struct node *fib_trie_get_first(struct fib_trie_iter *iter,
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struct trie *t)
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{
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struct node *n = rcu_dereference(t->trie);
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struct node *n ;
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if(!t)
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return NULL;
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n = rcu_dereference(t->trie);
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if(!iter)
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return NULL;
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if (n && IS_TNODE(n)) {
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iter->tnode = (struct tnode *) n;
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