linux-kernel - [PATCH printk v2 4/7] printk: Add struct console

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Date:   Thu, 24 Nov 2022 00:19:57 +0106
From:   John Ogness <john.ogness@...utronix.de>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Sergey Senozhatsky <senozhatsky@...omium.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH printk v2 4/7] printk: Add struct console_buffers

From: Thomas Gleixner <tglx@...utronix.de>

Create a data structure to replace the open coded separate buffers for
regular, extended, and dropped message formatting.

A separate @ext_text buffer is needed because info_print_ext_header()
and msg_print_ext_body() are not able to add the needed extra
information in-place.

@ext_text can be used for dropped text because they are never used at
the same time.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: John Ogness <john.ogness@...utronix.de>
---
 include/linux/console.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/console.h b/include/linux/console.h
index b2cf256c23b6..641c1ca7fb67 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -178,6 +178,16 @@ enum cons_flags {
 	CON_EXTENDED		= BIT(6),
 };
 
+/**
+ * struct console_buffers - console output text buffers
+ * @ext_text:		Buffer for extended log format or dropped text
+ * @text:		Buffer for ringbuffer text
+ */
+struct console_buffers {
+	char	ext_text[CONSOLE_EXT_LOG_MAX];
+	char	text[CONSOLE_LOG_MAX];
+};
+
 /**
  * struct console - The console descriptor structure
  * @name:		The name of the console driver
-- 
2.30.2