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mlx5: avoid unused variable warning

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When CONFIG_NET_CLS_ACT is disabled, we get a new warning in the mlx5
ethernet driver because the tc_for_each_action() loop never references
the iterator:

mellanox/mlx5/core/en_tc.c: In function 'mlx5e_stats_flower':
mellanox/mlx5/core/en_tc.c:431:20: error: unused variable 'a' [-Werror=unused-variable]
  struct tc_action *a;

This changes the dummy tc_for_each_action() macro by adding a
cast to void, letting the compiler know that the variable is
intentionally declared but not used here. I could not come up
with a nicer workaround, but this seems to do the trick.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: aad7e08d39 ("net/mlx5e: Hardware offloaded flower filter statistics support")
Fixes: 00175aec94 ("net/sched: Macro instead of CONFIG_NET_CLS_ACT ifdef")
Acked-By: Amir Vadai <amir@vadai.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2016-05-18 16:21:07 +02:00 committed by David S. Miller
parent b7552e1bcc
commit e6790fd861
1 changed files with 1 additions and 1 deletions
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2
include/net/act_api.h
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@ -192,7 +192,7 @@ static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
#else /* CONFIG_NET_CLS_ACT */
#define tc_no_actions(_exts) true
#define tc_for_each_action(_a, _exts) while (0)
#define tc_for_each_action(_a, _exts) while ((void)(_a), 0)
#define tcf_action_stats_update(a, bytes, packets, lastuse)
#endif /* CONFIG_NET_CLS_ACT */