[PATCH v1 1/1] sched/fair: Mark some static const with __maybe_unused

[Andy Shevchenko]

GCC considers that some static const defined in the lockdep_internals.h
are unused, which prevents `make W=1` and CONFIG_WERROR=y builds:

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 =
      |                            ^~~~~~~~~~~~~~~~~

Fix this by marking them with __maybe_unused.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 kernel/locking/lockdep_internals.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/locking/lockdep_internals.h b/kernel/locking/lockdep_internals.h
index 20f9ef58d3d0..82e71335f367 100644
--- a/kernel/locking/lockdep_internals.h
+++ b/kernel/locking/lockdep_internals.h
@@ -48,25 +48,25 @@ enum {
 };
 
 #define LOCKDEP_STATE(__STATE)	LOCKF_ENABLED_##__STATE |
-static const unsigned long LOCKF_ENABLED_IRQ =
+static __maybe_unused const unsigned long LOCKF_ENABLED_IRQ =
 #include "lockdep_states.h"
 	0;
 #undef LOCKDEP_STATE
 
 #define LOCKDEP_STATE(__STATE)	LOCKF_USED_IN_##__STATE |
-static const unsigned long LOCKF_USED_IN_IRQ =
+static __maybe_unused const unsigned long LOCKF_USED_IN_IRQ =
 #include "lockdep_states.h"
 	0;
 #undef LOCKDEP_STATE
 
 #define LOCKDEP_STATE(__STATE)	LOCKF_ENABLED_##__STATE##_READ |
-static const unsigned long LOCKF_ENABLED_IRQ_READ =
+static __maybe_unused const unsigned long LOCKF_ENABLED_IRQ_READ =
 #include "lockdep_states.h"
 	0;
 #undef LOCKDEP_STATE
 
 #define LOCKDEP_STATE(__STATE)	LOCKF_USED_IN_##__STATE##_READ |
-static const unsigned long LOCKF_USED_IN_IRQ_READ =
+static __maybe_unused const unsigned long LOCKF_USED_IN_IRQ_READ =
 #include "lockdep_states.h"
 	0;
 #undef LOCKDEP_STATE
-- 
2.47.2