linux-kernel - [PATCH v2 0/3] printk: introduce new macros pr_<level>

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Date:   Fri, 25 Nov 2022 20:09:45 +0100
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        linux-pm@...r.kernel.org, Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Andy Whitcroft <apw@...onical.com>,
        Joe Perches <joe@...ches.com>
Cc:     Thomas Weißschuh <linux@...ssschuh.net>,
        linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
        Dwaipayan Ray <dwaipayanray1@...il.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: [PATCH v2 0/3] printk: introduce new macros pr_<level>_cont()

This series adds new printk wrapper macros pr_<level>_cont().
These create continuation messages with an explicit level.

Explicit levels are useful when a continuation message is split from its main
message. Without the explicit level KERN_DEFAULT ("warn" by default) is used
which can lead to stray partial log messages when filtering by level.

Also checkpatch is modified to recommend the new macros over plain pr_cont().

Lastly the new macros are used in kernel/power/process.c as this file uses
continuation messages during system suspend-resume which creates a high
likelyhood of interspersed messages.

Changelog:

This was original a single patch but was expanded into a series.

v1: https://lore.kernel.org/lkml/20221121050946.3540-1-linux@weissschuh.net/
v1 -> v2:
  * Introduce new pr_<level>_cont() macros in printk.h
  * Add checkpatch.pl validation

Thomas Weißschuh (3):
  printk: introduce new macros pr_<level>_cont()
  checkpatch: handle new pr_<level>_cont macros
  power: process: use explicit levels for printk continuations

 include/linux/printk.h | 23 +++++++++++++++++++++++
 kernel/power/process.c | 18 +++++++++---------
 scripts/checkpatch.pl  | 10 ++++++++--
 3 files changed, 40 insertions(+), 11 deletions(-)

base-commit: 0b1dcc2cf55ae6523c6fbd0d741b3ac28c9f4536
-- 
2.38.1