linux-kernel - [PATCH v2 2/3] checkpatch: handle new pr_<level>

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Date:   Fri, 25 Nov 2022 20:09:47 +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 2/3] checkpatch: handle new pr_<level>_cont macros

These new macros from include/linux/printk.h replace the usage of plain
pr_cont().

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 scripts/checkpatch.pl | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 1e5e66ae5a52..fb1747639c9c 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -590,7 +590,7 @@ our $zero_initializer = qr{(?:(?:0[xX])?0+$Int_type?|NULL|false)\b};
 
 our $logFunctions = qr{(?x:
 	printk(?:_ratelimited|_once|_deferred_once|_deferred|)|
-	(?:[a-z0-9]+_){1,2}(?:printk|emerg|alert|crit|err|warning|warn|notice|info|debug|dbg|vdbg|devel|cont|WARN)(?:_ratelimited|_once|)|
+	(?:[a-z0-9]+_){1,2}(?:printk|emerg|alert|crit|err|warning|warn|notice|info|debug|dbg|vdbg|devel|cont|WARN)(?:_ratelimited|_once|_cont|)|
 	TP_printk|
 	WARN(?:_RATELIMIT|_ONCE|)|
 	panic|
@@ -6374,11 +6374,17 @@ sub process {
 		}
 
 # check for logging continuations
-		if ($line =~ /\bprintk\s*\(\s*KERN_CONT\b|\bpr_cont\s*\(/) {
+		if ($line =~ /\bprintk\s*\(\s*KERN_CONT\b|\bpr_([a-z]+_)?cont\s*\(/) {
 			WARN("LOGGING_CONTINUATION",
 			     "Avoid logging continuation uses where feasible\n" . $herecurr);
 		}
 
+# check for logging continuations without explicit level
+		if ($line =~ /\bpr_cont\s*\(/) {
+			WARN("LOGGING_CONTINUATION_WITHOUT_LEVEL",
+			     "Avoid logging continuation without level\n" . $herecurr);
+		}
+
 # check for unnecessary use of %h[xudi] and %hh[xudi] in logging functions
 		if (defined $stat &&
 		    $line =~ /\b$logFunctions\s*\(/ &&
-- 
2.38.1