linux-kernel - Re: [PATCH v2 2/3] status: Add user space API definitions for VSTATUS, NOKERNINFO and TIOCSTAT

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Date:   Sun, 6 Feb 2022 18:09:27 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Walt Drummond <walt@...mmond.us>
Cc:     agordeev@...ux.ibm.com, arnd@...db.de, benh@...nel.crashing.org,
        borntraeger@...ibm.com, chris@...kel.net, davem@...emloft.net,
        hca@...ux.ibm.com, deller@....de, ink@...assic.park.msu.ru,
        James.Bottomley@...senpartnership.com, jirislaby@...nel.org,
        mattst88@...il.com, jcmvbkbc@...il.com, mpe@...erman.id.au,
        paulus@...ba.org, rth@...ddle.net, dalias@...c.org,
        tsbogend@...ha.franken.de, gor@...ux.ibm.com, ysato@...rs.osdn.me,
        linux-kernel@...r.kernel.org, ar@...msu.ru,
        linux-alpha@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
        linux-xtensa@...ux-xtensa.org, sparclinux@...r.kernel.org
Subject: Re: [PATCH v2 2/3] status: Add user space API definitions for
 VSTATUS, NOKERNINFO and TIOCSTAT

On Sun, Feb 06, 2022 at 07:48:53AM -0800, Walt Drummond wrote:
> Add definitions for the VSTATUS control character, and the NOKERNINFO
> local control flag in the termios struct, and add an ioctl number for
> the ioctl TIOCSTAT.  Also add a default VSTATUS character (Ctrl-T)
> default valuses in termios.c_cc.  Do this for all architectures.
> 
> Signed-off-by: Walt Drummond <walt@...mmond.us>
> ---
>  arch/alpha/include/asm/termios.h         | 4 ++--
>  arch/alpha/include/uapi/asm/ioctls.h     | 1 +
>  arch/alpha/include/uapi/asm/termbits.h   | 2 ++
>  arch/ia64/include/asm/termios.h          | 4 ++--
>  arch/ia64/include/uapi/asm/termbits.h    | 2 ++
>  arch/mips/include/asm/termios.h          | 4 ++--
>  arch/mips/include/uapi/asm/ioctls.h      | 1 +
>  arch/mips/include/uapi/asm/termbits.h    | 2 ++
>  arch/parisc/include/asm/termios.h        | 4 ++--
>  arch/parisc/include/uapi/asm/ioctls.h    | 1 +
>  arch/parisc/include/uapi/asm/termbits.h  | 2 ++
>  arch/powerpc/include/asm/termios.h       | 4 ++--
>  arch/powerpc/include/uapi/asm/ioctls.h   | 2 ++
>  arch/powerpc/include/uapi/asm/termbits.h | 2 ++
>  arch/s390/include/asm/termios.h          | 4 ++--
>  arch/sh/include/uapi/asm/ioctls.h        | 1 +
>  arch/sparc/include/uapi/asm/ioctls.h     | 1 +
>  arch/sparc/include/uapi/asm/termbits.h   | 2 ++
>  arch/xtensa/include/uapi/asm/ioctls.h    | 1 +
>  include/asm-generic/termios.h            | 4 ++--
>  include/uapi/asm-generic/ioctls.h        | 1 +
>  include/uapi/asm-generic/termbits.h      | 2 ++
>  22 files changed, 37 insertions(+), 14 deletions(-)
> 
> diff --git a/arch/alpha/include/asm/termios.h b/arch/alpha/include/asm/termios.h
> index b7c77bb1bfd2..d28ddc649286 100644
> --- a/arch/alpha/include/asm/termios.h
> +++ b/arch/alpha/include/asm/termios.h
> @@ -8,9 +8,9 @@
>  	werase=^W	kill=^U		reprint=^R	sxtc=\0
>  	intr=^C		quit=^\		susp=^Z		<OSF/1 VDSUSP>
>  	start=^Q	stop=^S		lnext=^V	discard=^U
> -	vmin=\1		vtime=\0
> +	vmin=\1		vtime=\0        status=^T
>  */
> -#define INIT_C_CC "\004\000\000\177\027\025\022\000\003\034\032\000\021\023\026\025\001\000"
> +#define INIT_C_CC "\004\000\000\177\027\025\022\000\003\034\032\000\021\023\026\025\001\000\024"
>  
>  /*
>   * Translate a "termio" structure into a "termios". Ugh.
> diff --git a/arch/alpha/include/uapi/asm/ioctls.h b/arch/alpha/include/uapi/asm/ioctls.h
> index 971311605288..70fdeab2b5f2 100644
> --- a/arch/alpha/include/uapi/asm/ioctls.h
> +++ b/arch/alpha/include/uapi/asm/ioctls.h
> @@ -124,5 +124,6 @@
>  
>  #define TIOCMIWAIT	0x545C	/* wait for a change on serial input line(s) */
>  #define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
> +#define TIOCSTAT	_IO('T', 0x5E)	/* display process group stats on tty */
>  
>  #endif /* _ASM_ALPHA_IOCTLS_H */
> diff --git a/arch/alpha/include/uapi/asm/termbits.h b/arch/alpha/include/uapi/asm/termbits.h
> index 4575ba34a0ea..9a1b9aa92d29 100644
> --- a/arch/alpha/include/uapi/asm/termbits.h
> +++ b/arch/alpha/include/uapi/asm/termbits.h
> @@ -70,6 +70,7 @@ struct ktermios {
>  #define VDISCARD 15
>  #define VMIN 16
>  #define VTIME 17
> +#define VSTATUS 18
>  
>  /* c_iflag bits */
>  #define IGNBRK	0000001
> @@ -203,6 +204,7 @@ struct ktermios {
>  #define PENDIN	0x20000000
>  #define IEXTEN	0x00000400
>  #define EXTPROC	0x10000000
> +#define NOKERNINFO 0x40000000

Here, and elsewhere, you seem to mix tabs and spaces.  Please use what
is in the original file (tabs here.)

>  /* Values for the ACTION argument to `tcflow'.  */
>  #define	TCOOFF		0
> diff --git a/arch/ia64/include/asm/termios.h b/arch/ia64/include/asm/termios.h
> index 589c026444cc..40e83f9b6ead 100644
> --- a/arch/ia64/include/asm/termios.h
> +++ b/arch/ia64/include/asm/termios.h
> @@ -15,9 +15,9 @@
>  	eof=^D		vtime=\0	vmin=\1		sxtc=\0
>  	start=^Q	stop=^S		susp=^Z		eol=\0
>  	reprint=^R	discard=^U	werase=^W	lnext=^V
> -	eol2=\0
> +	eol2=\0         status=^T

Same here.  And for the other files in this patch.  Let's keep them
unified please.

thanks,

greg k-h