linux-kernel - [PATCH] maple_tree: Fix build failure with W=1 and LLVM=1

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Date: Fri,  3 May 2024 17:50:27 +0800
From: Kuan-Wei Chiu <visitorckw@...il.com>
To: akpm@...ux-foundation.org,
	Liam.Howlett@...cle.com,
	nathan@...nel.org
Cc: ndesaulniers@...gle.com,
	morbo@...gle.com,
	justinstitt@...gle.com,
	linux-kernel@...r.kernel.org,
	maple-tree@...ts.infradead.org,
	linux-mm@...ck.org,
	llvm@...ts.linux.dev,
	jserv@...s.ncku.edu.tw,
	Kuan-Wei Chiu <visitorckw@...il.com>
Subject: [PATCH] maple_tree: Fix build failure with W=1 and LLVM=1

When compiling library code using "make W=1 LLVM=1 lib/", clang
generated the following compilation errors:

lib/maple_tree.c:351:21: error: unused function 'mte_set_full' [-Werror,-Wunused-function]
static inline void *mte_set_full(const struct maple_enode *node)
                    ^
lib/maple_tree.c:356:21: error: unused function 'mte_clear_full' [-Werror,-Wunused-function]
static inline void *mte_clear_full(const struct maple_enode *node)
                    ^
lib/maple_tree.c:361:20: error: unused function 'mte_has_null' [-Werror,-Wunused-function]
static inline bool mte_has_null(const struct maple_enode *node)
                   ^
3 errors generated.

Remove unused static inline functions to resolve compilation errors
with clang.

Signed-off-by: Kuan-Wei Chiu <visitorckw@...il.com>
---
 lib/maple_tree.c | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 55e1b35bf877..cd3f5399f9f3 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -348,21 +348,6 @@ 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)
-{
-	return (void *)((unsigned long)node & ~MAPLE_ENODE_NULL);
-}
-
-static inline void *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)
-{
-	return (unsigned long)node & MAPLE_ENODE_NULL;
-}
-
 static __always_inline bool ma_is_root(struct maple_node *node)
 {
 	return ((unsigned long)node->parent & MA_ROOT_PARENT);
-- 
2.34.1