linux-kernel - RE: [PATCH v3 2/2] tty/sysrq: Dump printk ring buffer messages via sysrq

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Date: Thu, 18 Jan 2024 22:56:59 +0000
From: David Laight <David.Laight@...LAB.COM>
To: 'Sreenath Vijayan' <sreenath.vijayan@...y.com>,
	"john.ogness@...utronix.de" <john.ogness@...utronix.de>, "corbet@....net"
	<corbet@....net>, "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"jirislaby@...nel.org" <jirislaby@...nel.org>, "rdunlap@...radead.org"
	<rdunlap@...radead.org>, "pmladek@...e.com" <pmladek@...e.com>
CC: "rostedt@...dmis.org" <rostedt@...dmis.org>, "senozhatsky@...omium.org"
	<senozhatsky@...omium.org>, "linux-doc@...r.kernel.org"
	<linux-doc@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-serial@...r.kernel.org"
	<linux-serial@...r.kernel.org>, "taichi.shimoyashiki@...y.com"
	<taichi.shimoyashiki@...y.com>, "daniel.palmer@...y.com"
	<daniel.palmer@...y.com>, "anandakumar.balasubramaniam@...y.com"
	<anandakumar.balasubramaniam@...y.com>
Subject: RE: [PATCH v3 2/2] tty/sysrq: Dump printk ring buffer messages via
 sysrq

From: Sreenath Vijayan
> Sent: 17 January 2024 11:14
...
>  /* Key Operations table and lock */
>  static DEFINE_SPINLOCK(sysrq_key_table_lock);
> 
> @@ -505,7 +523,7 @@ static const struct sysrq_key_op *sysrq_key_table[62] = {
>  	NULL,				/* A */
>  	NULL,				/* B */
>  	NULL,				/* C */
> -	NULL,				/* D */
> +	&sysrq_dmesg_dump_op,		/* D */
>  	NULL,				/* E */
>  	NULL,				/* F */
>  	NULL,				/* G */

That looks like it ought to use C99 initialisers:
	['D' - 'A'] = &sysrq_dmesg_dump_op,

Possible with a #define to hide the offset.

	David

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