linux-kernel - Re: [PATCH v2 net-next 1/2] indirect_call_wrapper: extend indirect wrapper to support up to 4 calls

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Date:   Tue, 23 Jun 2020 19:50:30 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Brian Vazquez <brianvv@...gle.com>,
        Brian Vazquez <brianvv.kernel@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S . Miller" <davem@...emloft.net>
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next 1/2] indirect_call_wrapper: extend indirect
 wrapper to support up to 4 calls

On Tue, 2020-06-23 at 09:42 -0700, Brian Vazquez wrote:
> There are many places where 2 annotations are not enough. This patch
> adds INDIRECT_CALL_3 and INDIRECT_CALL_4 to cover such cases.
> 
> Signed-off-by: Brian Vazquez <brianvv@...gle.com>
> ---
>  include/linux/indirect_call_wrapper.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/include/linux/indirect_call_wrapper.h b/include/linux/indirect_call_wrapper.h
> index 00d7e8e919c6..54c02c84906a 100644
> --- a/include/linux/indirect_call_wrapper.h
> +++ b/include/linux/indirect_call_wrapper.h
> @@ -23,6 +23,16 @@
>  		likely(f == f2) ? f2(__VA_ARGS__) :			\
>  				  INDIRECT_CALL_1(f, f1, __VA_ARGS__);	\
>  	})
> +#define INDIRECT_CALL_3(f, f3, f2, f1, ...)					\
> +	({									\
> +		likely(f == f3) ? f3(__VA_ARGS__) :				\
> +				  INDIRECT_CALL_2(f, f2, f1, __VA_ARGS__);	\
> +	})
> +#define INDIRECT_CALL_4(f, f4, f3, f2, f1, ...)					\
> +	({									\
> +		likely(f == f4) ? f4(__VA_ARGS__) :				\
> +				  INDIRECT_CALL_3(f, f3, f2, f1, __VA_ARGS__);	\
> +	})
>  
>  #define INDIRECT_CALLABLE_DECLARE(f)	f
>  #define INDIRECT_CALLABLE_SCOPE
> @@ -30,6 +40,8 @@
>  #else
>  #define INDIRECT_CALL_1(f, f1, ...) f(__VA_ARGS__)
>  #define INDIRECT_CALL_2(f, f2, f1, ...) f(__VA_ARGS__)
> +#define INDIRECT_CALL_3(f, f3, f2, f1, ...) f(__VA_ARGS__)
> +#define INDIRECT_CALL_4(f, f4, f3, f2, f1, ...) f(__VA_ARGS__)
>  #define INDIRECT_CALLABLE_DECLARE(f)
>  #define INDIRECT_CALLABLE_SCOPE		static
>  #endif

Acked-by: Paolo Abeni <pabeni@...hat.com>