Warn on probable misuses of logging functions with KERN_<LEVEL>
like pr_err(KERN_ERR "foo\n");
Suggested-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
---
> > - printk(KERN_ERR "ksm: register sysfs failed\n");
> > + pr_err(KERN_ERR "ksm: register sysfs failed\n");
> A quick grep indicates that we have the same mistake in tens of places.
> checkpatch rule, please?
scripts/checkpatch.pl | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 52a223e..374abf4 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4447,6 +4447,17 @@ sub process {
}
}
+# check for logging functions with KERN_<LEVEL>
+ if ($line !~ /printk\s*\(/ &&
+ $line =~ /\b$logFunctions\s*\(.*\b(KERN_[A-Z]+)\b/) {
+ my $level = $1;
+ if (WARN("UNNECESSARY_KERN_LEVEL",
+ "Possible unnecessary $level\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/\s*$level\s*//;
+ }
+ }
+
# check for bad placement of section $InitAttribute (e.g.: __initdata)
if ($line =~ /(\b$InitAttribute\b)/) {
my $attr = $1;
--
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