linux-kernel - [tip: locking/core] locking/lockdep: Change 'static const' variables to enum values

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Message-ID: <175294681090.1420.17391042185079790860.tip-bot2@tip-bot2>
Date: Sat, 19 Jul 2025 17:40:10 -0000
From: "tip-bot2 for Arnd Bergmann" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 Arnd Bergmann <arnd@...db.de>, Boqun Feng <boqun.feng@...il.com>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: locking/core] locking/lockdep: Change 'static const' variables
 to enum values

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     bd27cfb58c2803923702cd80289b35b7b8108859
Gitweb:        https://git.kernel.org/tip/bd27cfb58c2803923702cd80289b35b7b8108859
Author:        Arnd Bergmann <arnd@...db.de>
AuthorDate:    Wed, 09 Apr 2025 14:22:58 +02:00
Committer:     Boqun Feng <boqun.feng@...il.com>
CommitterDate: Mon, 14 Jul 2025 21:57:29 -07:00

locking/lockdep: Change 'static const' variables to enum values

gcc warns about 'static const' variables even in headers when building
with -Wunused-const-variables enabled:

In file included from kernel/locking/lockdep_proc.c:25:
kernel/locking/lockdep_internals.h:69:28: error: 'LOCKF_USED_IN_IRQ_READ' defined but not used [-Werror=unused-const-variable=]
   69 | static const unsigned long LOCKF_USED_IN_IRQ_READ =
      |                            ^~~~~~~~~~~~~~~~~~~~~~
kernel/locking/lockdep_internals.h:63:28: error: 'LOCKF_ENABLED_IRQ_READ' defined but not used [-Werror=unused-const-variable=]
   63 | static const unsigned long LOCKF_ENABLED_IRQ_READ =
      |                            ^~~~~~~~~~~~~~~~~~~~~~
kernel/locking/lockdep_internals.h:57:28: error: 'LOCKF_USED_IN_IRQ' defined but not used [-Werror=unused-const-variable=]
   57 | static const unsigned long LOCKF_USED_IN_IRQ =
      |                            ^~~~~~~~~~~~~~~~~
kernel/locking/lockdep_internals.h:51:28: error: 'LOCKF_ENABLED_IRQ' defined but not used [-Werror=unused-const-variable=]
   51 | static const unsigned long LOCKF_ENABLED_IRQ =
      |                            ^~~~~~~~~~~~~~~~~

This one is easy to avoid by changing the generated constant definition
into an equivalent enum.

Tested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Boqun Feng <boqun.feng@...il.com>
Link: https://lore.kernel.org/r/20250409122314.2848028-6-arnd@kernel.org
---
 kernel/locking/lockdep_internals.h | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/kernel/locking/lockdep_internals.h b/kernel/locking/lockdep_internals.h
index 82156ca..0e5e6ff 100644
--- a/kernel/locking/lockdep_internals.h
+++ b/kernel/locking/lockdep_internals.h
@@ -47,29 +47,31 @@ enum {
 	__LOCKF(USED_READ)
 };
 
+enum {
 #define LOCKDEP_STATE(__STATE)	LOCKF_ENABLED_##__STATE |
-static const unsigned long LOCKF_ENABLED_IRQ =
+	LOCKF_ENABLED_IRQ =
 #include "lockdep_states.h"
-	0;
+	0,
 #undef LOCKDEP_STATE
 
 #define LOCKDEP_STATE(__STATE)	LOCKF_USED_IN_##__STATE |
-static const unsigned long LOCKF_USED_IN_IRQ =
+	LOCKF_USED_IN_IRQ =
 #include "lockdep_states.h"
-	0;
+	0,
 #undef LOCKDEP_STATE
 
 #define LOCKDEP_STATE(__STATE)	LOCKF_ENABLED_##__STATE##_READ |
-static const unsigned long LOCKF_ENABLED_IRQ_READ =
+	LOCKF_ENABLED_IRQ_READ =
 #include "lockdep_states.h"
-	0;
+	0,
 #undef LOCKDEP_STATE
 
 #define LOCKDEP_STATE(__STATE)	LOCKF_USED_IN_##__STATE##_READ |
-static const unsigned long LOCKF_USED_IN_IRQ_READ =
+	LOCKF_USED_IN_IRQ_READ =
 #include "lockdep_states.h"
-	0;
+	0,
 #undef LOCKDEP_STATE
+};
 
 #define LOCKF_ENABLED_IRQ_ALL (LOCKF_ENABLED_IRQ | LOCKF_ENABLED_IRQ_READ)
 #define LOCKF_USED_IN_IRQ_ALL (LOCKF_USED_IN_IRQ | LOCKF_USED_IN_IRQ_READ)