On Wed, 2019-09-04 at 18:04 +0300, Sakari Ailus wrote:

On Tue, Sep 03, 2019 at 03:06:07PM +0200, Petr Mladek wrote:

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On Mon 2019-09-02 11:32:39, Sakari Ailus wrote:

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diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl

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@@ -5995,7 +5995,8 @@ sub process {
 				while ($fmt =~ /(\%[\*\d\.]*p(\w))/g) {
 					$specifier = $1;
 					$extension = $2;
-					if ($extension !~ /[SsBKRraEhMmIiUDdgVCbGNOxt]/) {
+					if ($extension !~ /[SsBKRraEhMmIiUDdgVCbGNOxtf]/ ||
+					    $extension =~ /^f[^w]/) {

This does not work. $extension seems to have only one character.

Good catch. \w indeed matches a single letter; I'll change that to \w+ and
change the other uses accordingly.

If you want to make changes to checkpatch, please
send patches to the checkpatch maintainers.

Don't break other parsing of $2/#extension.

If you really need to know whatever follows the specific
extension letter use another capture group.

			while ($fmt =~  /(\%[\*\d\.]*p(\w)(\w*))/g) {
				$specifier = $1;
				$extension = $2;
				$qualifier = $3;

etc...

Then verify $qualifier or $3 is not undef if necessary