linux-kernel - [PATCH] checkpatch: add IDR to the deprecated list

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Message-ID: <20251031111908.2266077-2-clopez@suse.de>
Date: Fri, 31 Oct 2025 12:19:09 +0100
From: Carlos López <clopez@...e.de>
To: linux-kernel@...r.kernel.org
Cc: willy@...radead.org,
	Carlos López <clopez@...e.de>,
	Dan Williams <dan.j.williams@...el.com>,
	Andy Whitcroft <apw@...onical.com>,
	Joe Perches <joe@...ches.com>,
	Dwaipayan Ray <dwaipayanray1@...il.com>,
	Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: [PATCH] checkpatch: add IDR to the deprecated list

As of commit 85656ec193e9, the IDR interface is marked as deprecated
in the documentation, but no checks are made in that regard for new
code. Add the existing IDR initialization APIs to the deprecated list
in checkpatch, so that if new code is introduced using these APIs, a
warning is emitted.

Suggested-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Carlos López <clopez@...e.de>
---
 scripts/checkpatch.pl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 92669904eecc..bc72fa66c0ef 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -860,6 +860,10 @@ our %deprecated_apis = (
 	"kunmap"				=> "kunmap_local",
 	"kmap_atomic"				=> "kmap_local_page",
 	"kunmap_atomic"				=> "kunmap_local",
+	#These should be enough to drive away new IDR users
+	"DEFINE_IDR"				=> "DEFINE_XARRAY",
+	"idr_init"				=> "xa_init",
+	"idr_init_base"				=> "xa_init_flags"
 );
 
 #Create a search pattern for all these strings to speed up a loop below
-- 
2.51.0