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netlink: replace __NLA_ENSURE implementation

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We already have BUILD_BUG_ON_ZERO() which I just hadn't found
before, so we should use it here instead of open-coding another
implementation thereof.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg 2018-10-12 12:53:00 +02:00 committed by David S. Miller
parent e32cf9a386
commit 5886d932e5
1 changed files with 1 additions and 1 deletions
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include/net/netlink.h
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@ -311,7 +311,7 @@ struct nla_policy {
#define NLA_POLICY_NESTED_ARRAY(maxattr, policy) \
{ .type = NLA_NESTED_ARRAY, .validation_data = policy, .len = maxattr }
#define __NLA_ENSURE(condition) (sizeof(char[1 - 2*!(condition)]) - 1)
#define __NLA_ENSURE(condition) BUILD_BUG_ON_ZERO(!(condition))
#define NLA_ENSURE_INT_TYPE(tp) \
(__NLA_ENSURE(tp == NLA_S8 || tp == NLA_U8 || \
tp == NLA_S16 || tp == NLA_U16 || \