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lockdep: Mark chain_hlock_class_idx() with __maybe_unused

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When chain_hlock_class_idx() is unused, it prevents kernel builds with
clang, `make W=1` and CONFIG_WERROR=y, CONFIG_LOCKDEP=y and
CONFIG_PROVE_LOCKING=n:

kernel/locking/lockdep.c:435:28: error: unused function 'chain_hlock_class_idx' [-Werror,-Wunused-function]

Fix this by marking it with __maybe_unused.

See also commit 6863f5643dd7 ("kbuild: allow Clang to find unused static
inline functions for W=1 build").

[Boqun: add more config information of the error]

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20241209170810.1485183-1-andriy.shevchenko@linux.intel.com
This commit is contained in:
Andy Shevchenko 2024-12-09 19:08:10 +02:00 committed by Boqun Feng
parent bd7b5ae266
commit 8148fa2e02
1 changed files with 1 additions and 1 deletions
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2
kernel/locking/lockdep.c
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@ -430,7 +430,7 @@ static inline u16 hlock_id(struct held_lock *hlock)
return (hlock->class_idx | (hlock->read << MAX_LOCKDEP_KEYS_BITS));
}
static inline unsigned int chain_hlock_class_idx(u16 hlock_id)
static inline __maybe_unused unsigned int chain_hlock_class_idx(u16 hlock_id)
{
return hlock_id & (MAX_LOCKDEP_KEYS - 1);
}