linux-kernel - [PATCH] checkpatch: printks always need a KERN

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Message-Id: <61980ef41d5b9b6543da1c49055042e0ab74d308.1507047008.git.joe@perches.com>
Date:   Tue,  3 Oct 2017 09:10:32 -0700
From:   Joe Perches <joe@...ches.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Andy Whitcroft <apw@...onical.com>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] checkpatch: printks always need a KERN_<LEVEL>

There was code in checkpatch that allowed continuation printks
to be used without KERN_CONT.  Remove the continuation check
and always require a KERN_<LEVEL>.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 scripts/checkpatch.pl | 26 ++++----------------------
 1 file changed, 4 insertions(+), 22 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index dd2c262aebbf..fa6d76f1d58b 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3829,28 +3829,10 @@ sub process {
 			     "Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr);
 		}
 
-# printk should use KERN_* levels.  Note that follow on printk's on the
-# same line do not need a level, so we use the current block context
-# to try and find and validate the current printk.  In summary the current
-# printk includes all preceding printk's which have no newline on the end.
-# we assume the first bad printk is the one to report.
-		if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
-			my $ok = 0;
-			for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
-				#print "CHECK<$lines[$ln - 1]\n";
-				# we have a preceding printk if it ends
-				# with "\n" ignore it, else it is to blame
-				if ($lines[$ln - 1] =~ m{\bprintk\(}) {
-					if ($rawlines[$ln - 1] !~ m{\\n"}) {
-						$ok = 1;
-					}
-					last;
-				}
-			}
-			if ($ok == 0) {
-				WARN("PRINTK_WITHOUT_KERN_LEVEL",
-				     "printk() should include KERN_ facility level\n" . $herecurr);
-			}
+# printk should use KERN_* levels
+		if ($line =~ /\bprintk\s*\(\s*(?!KERN_[A-Z]+\b)/) {
+			WARN("PRINTK_WITHOUT_KERN_LEVEL",
+			     "printk() should include KERN_<LEVEL> facility level\n" . $herecurr);
 		}
 
 		if ($line =~ /\bprintk\s*\(\s*KERN_([A-Z]+)/) {
-- 
2.10.0.rc2.1.g053435c