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ipv6: fib: hide unused 'pn' variable 

When CONFIG_IPV6_SUBTREES is disabled, the only user is hidden, causing
a 'make W=1' warning:

net/ipv6/ip6_fib.c: In function 'fib6_add':
net/ipv6/ip6_fib.c:1388:32: error: variable 'pn' set but not used [-Werror=unused-but-set-variable]

Add another #ifdef around the variable declaration, matching the other
uses in this file.

Fixes: 66729e18df ("[IPV6] ROUTE: Make sure we have fn->leaf when adding a node on subtree.")
Link: https://lore.kernel.org/netdev/20240322131746.904943-1-arnd@kernel.org/
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20240408074219.3030256-1-arnd@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Arnd Bergmann 2024-04-08 09:42:02 +02:00 committed by Paolo Abeni
parent faf2300618
commit 74043489fc
1 changed files with 5 additions and 2 deletions
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7
net/ipv6/ip6_fib.c
View File

@ -1385,7 +1385,10 @@ int fib6_add(struct fib6_node *root, struct fib6_info *rt,
struct nl_info *info, struct netlink_ext_ack *extack)
{
struct fib6_table *table = rt->fib6_table;
struct fib6_node *fn, *pn = NULL;
struct fib6_node *fn;
#ifdef CONFIG_IPV6_SUBTREES
struct fib6_node *pn = NULL;
#endif
int err = -ENOMEM;
int allow_create = 1;
int replace_required = 0;
@ -1409,9 +1412,9 @@ int fib6_add(struct fib6_node *root, struct fib6_info *rt,
goto out;
}
#ifdef CONFIG_IPV6_SUBTREES
pn = fn;
#ifdef CONFIG_IPV6_SUBTREES
if (rt->fib6_src.plen) {
struct fib6_node *sn;