From: Sascha Hauer <sha@pengutronix.de>
To: Ahmad Fatoum <ahmad@a3f.at>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] compiler: add support for fallthrough attribute
Date: Thu, 3 Mar 2022 11:07:18 +0100 [thread overview]
Message-ID: <20220303100718.GG19585@pengutronix.de> (raw)
In-Reply-To: <20220302201215.658986-1-ahmad@a3f.at>
On Wed, Mar 02, 2022 at 09:12:15PM +0100, Ahmad Fatoum wrote:
> Use of it is enforced in Linux now, so code we'll port may contain it.
> Import the definition.
>
> Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
> ---
> include/linux/compiler_types.h | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
Applied, thanks
Sascha
>
> diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
> index aa9cbcac7740..bc1b43aab0dc 100644
> --- a/include/linux/compiler_types.h
> +++ b/include/linux/compiler_types.h
> @@ -112,6 +112,27 @@ struct ftrace_likely_data {
> #define __deprecated
> #define __deprecated_for_modules
>
> +#ifndef __has_attribute
> +#define __has_attribute(...) 0
> +#endif
> +
> +/*
> + * Add the pseudo keyword 'fallthrough' so case statement blocks
> + * must end with any of these keywords:
> + * break;
> + * fallthrough;
> + * continue;
> + * goto <label>;
> + * return [expression];
> + *
> + * gcc: https://gcc.gnu.org/onlinedocs/gcc/Statement-Attributes.html#Statement-Attributes
> + */
> +#if __has_attribute(__fallthrough__)
> +# define fallthrough __attribute__((__fallthrough__))
> +#else
> +# define fallthrough do {} while (0) /* fallthrough */
> +#endif
> +
> #endif /* __KERNEL__ */
>
> #endif /* __ASSEMBLY__ */
> --
> 2.34.1
>
>
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prev parent reply other threads:[~2022-03-03 10:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-02 20:12 Ahmad Fatoum
2022-03-03 10:07 ` Sascha Hauer [this message]
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