netlink: replace __NLA_ENSURE implementation
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>
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@ -311,7 +311,7 @@ struct nla_policy {
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#define NLA_POLICY_NESTED_ARRAY(maxattr, policy) \
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{ .type = NLA_NESTED_ARRAY, .validation_data = policy, .len = maxattr }
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#define __NLA_ENSURE(condition) (sizeof(char[1 - 2*!(condition)]) - 1)
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#define __NLA_ENSURE(condition) BUILD_BUG_ON_ZERO(!(condition))
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#define NLA_ENSURE_INT_TYPE(tp) \
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(__NLA_ENSURE(tp == NLA_S8 || tp == NLA_U8 || \
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tp == NLA_S16 || tp == NLA_U16 || \
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