linux-kernel - Re: [PATCH] alpha: don't reference obsolete termio struct for TC* constants

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Message-ID: <875xcaaef9.fsf@gentoo.org>
Date: Sun, 19 Oct 2025 20:18:18 +0100
From: Sam James <sam@...too.org>
To: Richard Henderson <richard.henderson@...aro.org>
Cc: Matt Turner <mattst88@...il.com>,  Stian Halseth <stian@....no>,  Magnus
 Lindholm <linmag7@...il.com>,  linux-alpha@...r.kernel.org,
  linux-kernel@...r.kernel.org
Subject: Re: [PATCH] alpha: don't reference obsolete termio struct for TC*
 constants

Sam James <sam@...too.org> writes:

> Similar in nature to ab107276607af90b13a5994997e19b7b9731e251. glibc-2.42
> drops the legacy termio struct, but the ioctls.h header still defines some
> TC* constants in terms of termio (via sizeof). Hardcode the values instead.
>
> This fixes building Python for example, which falls over like:
>   ./Modules/termios.c:1119:16: error: invalid application of 'sizeof' to incomplete type 'struct termio'
>
> Link: https://bugs.gentoo.org/961769
> Link: https://bugs.gentoo.org/962600
> Co-authored-by: Stian Halseth <stian@....no>
> Co-authored-by: Magnus Lindholm <linmag7@...il.com>
> Signed-off-by: Sam James <sam@...too.org>
> ---
> v3: Fix constants per Magnus.
> v2: Fix title.

Ping.

>
>  arch/alpha/include/uapi/asm/ioctls.h | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/arch/alpha/include/uapi/asm/ioctls.h b/arch/alpha/include/uapi/asm/ioctls.h
> index 971311605288f..a09d04b49cc65 100644
> --- a/arch/alpha/include/uapi/asm/ioctls.h
> +++ b/arch/alpha/include/uapi/asm/ioctls.h
> @@ -23,10 +23,10 @@
>  #define TCSETSW		_IOW('t', 21, struct termios)
>  #define TCSETSF		_IOW('t', 22, struct termios)
>  
> -#define TCGETA		_IOR('t', 23, struct termio)
> -#define TCSETA		_IOW('t', 24, struct termio)
> -#define TCSETAW		_IOW('t', 25, struct termio)
> -#define TCSETAF		_IOW('t', 28, struct termio)
> +#define TCGETA          0x40127417
> +#define TCSETA          0x80127418
> +#define TCSETAW         0x80127419
> +#define TCSETAF         0x8012741c
>  
>  #define TCSBRK		_IO('t', 29)
>  #define TCXONC		_IO('t', 30)