From 3dc89677fbba48e10653cff2c7a8972b62eb22fd Mon Sep 17 00:00:00 2001
From: Petr Vorel <pvorel@suse.cz>
Date: Fri, 4 Sep 2026 13:02:28 +0200
Subject: checkpatch: ignore <inttypes.h> format macros for userspace tools

Constants from <inttypes.h> are used only in userspace tools, they are
from ISO C99, let's don't report it:

    arch/mips/boot/tools/relocs.c:572: CHECK: Avoid CamelCase: <PRIx32>
    arch/s390/tools/relocs.c:52: CHECK: Avoid CamelCase: <PRIu64>
    tools/testing/selftests/mm/vm_util.c:244: CHECK: Avoid CamelCase: <SCNu64>

Link: https://lore.kernel.org/20260904110230.1219037-3-pvorel@suse.cz
Signed-off-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
---
 scripts/checkpatch.pl | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'scripts/checkpatch.pl')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b8702f6bc9b5..b458c7f22684 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -5950,6 +5950,8 @@ sub process {
 #Ignore SI style variants like nS, mV and dB
 #(ie: max_uV, regulator_min_uA_show, RANGE_mA_VALUE)
 			    $var !~ /^(?:[a-z0-9_]*|[A-Z0-9_]*)?_?[a-z][A-Z](?:_[a-z0-9_]+|_[A-Z0-9_]+)?$/ &&
+#Ignore <inttypes.h> format macros (e.g. PRIu64, SCNu64)
+			    (is_userspace($realfile) ? $var !~ /^(?:PRI|SCN)[dioux][A-Z0-9]+$/ : 1) &&
 #Ignore some three character SI units explicitly, like MiB and KHz
 			    $var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) {
 				while ($var =~ m{\b($Ident)}g) {
-- 
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