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checkpatch: add printk_once and printk_ratelimit to prefer pr_<level> warning

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Add the _once and _ratelimited variants to the test for
printk(KERN_<LEVEL> that should prefer pr_<level>.

Miscellanea:

o Add comment description for the conversions

[[email protected]: fixlet]
  Link: https://lkml.kernel.org/r/[email protected]: https://lkml.kernel.org/r/[email protected]

Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Joe Perches authored and Linus Torvalds committed 2020-12-15 22:46:17 -08:00
1 parent 7da07c31b1
commit f5eea3b044
1 file changed
+10 -3
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scripts/checkpatch.pl
+10 -3
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@@ -4543,16 +4543,23 @@ sub process {
"printk() should include KERN_<LEVEL> facility level\n" . $herecurr);
}
if ($line =~ /\bprintk\s*\(\s*KERN_([A-Z]+)/) {
my $orig = $1;
# prefer variants of (subsystem|netdev|dev|pr)_<level> to printk(KERN_<LEVEL>
if ($line =~ /\b(printk(_once|_ratelimited)?)\s*\(\s*KERN_([A-Z]+)/) {
my $printk = $1;
my $modifier = $2;
my $orig = $3;
$modifier = "" if (!defined($modifier));
my $level = lc($orig);
$level = "warn" if ($level eq "warning");
my $level2 = $level;
$level2 = "dbg" if ($level eq "debug");
$level .= $modifier;
$level2 .= $modifier;
WARN("PREFER_PR_LEVEL",
"Prefer [subsystem eg: netdev]_$level2([subsystem]dev, ... then dev_$level2(dev, ... then pr_$level(... to printk(KERN_$orig ...\n" . $herecurr);
"Prefer [subsystem eg: netdev]_$level2([subsystem]dev, ... then dev_$level2(dev, ... then pr_$level(... to $printk(KERN_$orig ...\n" . $herecurr);
}
# prefer dev_<level> to dev_printk(KERN_<LEVEL>
if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) {
my $orig = $1;
my $level = lc($orig);