From: Andy Shevchenko Date: Mon, 9 Dec 2024 17:08:10 +0000 (+0200) Subject: lockdep: Mark chain_hlock_class_idx() with __maybe_unused X-Git-Tag: v6.14-rc1~188^2~2^2~7 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8148fa2e022bae29f21bb9a2c4cc796334fd372b;p=thirdparty%2Fkernel%2Fstable.git lockdep: Mark chain_hlock_class_idx() with __maybe_unused 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 Signed-off-by: Boqun Feng Link: https://lore.kernel.org/r/20241209170810.1485183-1-andriy.shevchenko@linux.intel.com --- diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 2d8ec0351ef9b..fe04a2145ca7a 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -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); }