linux-kernel - [PATCH] checkpatch.pl: warn against using %Z

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Message-ID: <20170109235955.GA6787@avx2>
Date:   Tue, 10 Jan 2017 02:59:55 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, apw@...onical.com, joe@...ches.com
Subject: [PATCH] checkpatch.pl: warn against using %Z

%Z is going to be removed in favour of %z.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 scripts/checkpatch.pl |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -5189,6 +5189,12 @@ sub process {
 				     "\%Ld/%Lu are not-standard C, use %lld/%llu\n" . $herecurr);
 				last;
 			}
+			# check for %Z
+			if ($string =~ /(?<!%)%[\*\d\.\$]*Z[diouxX]/) {
+				WARN("PRINTF_Z",
+				     "%Z is non-standard C, use %z\n" . $herecurr);
+				last;
+			}
 			if ($string =~ /0x%[\*\d\.\$\Llzth]*[udi]/) {
 				ERROR("PRINTF_0xDECIMAL",
 				      "Prefixing 0x with decimal output is defective\n" . $herecurr);