From: Liam R. Howlett Date: Sat, 7 Sep 2024 02:15:06 +0000 (-0400) Subject: maple_tree: mark three functions as __maybe_unused X-Git-Tag: v6.12-rc1~115^2~42 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1930c6ad93ad01f82bb7965bbc04eb5a763f856d;p=thirdparty%2Fkernel%2Flinux.git maple_tree: mark three functions as __maybe_unused People keep trying to remove three functions that are going to be used in a feature that is being developed. Dropping the functions entirely may end up with people trying to use the bit for other uses, as people have tried in the past. Adding __maybe_unused stops compilers complaining about the unused functions so they can be silently optimised out of the compiled code and people won't try to claim the bit for another use. Link: https://lore.kernel.org/all/20230726080916.17454-2-zhangpeng.00@bytedance.com/ Link: https://lore.kernel.org/all/202408310728.S7EE59BN-lkp@intel.com/ Link: https://lkml.kernel.org/r/20240907021506.4018676-1-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Reviewed-by: Lorenzo Stoakes Reviewed-by: Kuan-Wei Chiu Signed-off-by: Andrew Morton --- diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 2058452e5ff33..2a57e489b2060 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -348,17 +348,17 @@ static inline void *mte_safe_root(const struct maple_enode *node) return (void *)((unsigned long)node & ~MAPLE_ROOT_NODE); } -static inline void *mte_set_full(const struct maple_enode *node) +static inline void __maybe_unused *mte_set_full(const struct maple_enode *node) { return (void *)((unsigned long)node & ~MAPLE_ENODE_NULL); } -static inline void *mte_clear_full(const struct maple_enode *node) +static inline void __maybe_unused *mte_clear_full(const struct maple_enode *node) { return (void *)((unsigned long)node | MAPLE_ENODE_NULL); } -static inline bool mte_has_null(const struct maple_enode *node) +static inline bool __maybe_unused mte_has_null(const struct maple_enode *node) { return (unsigned long)node & MAPLE_ENODE_NULL; }