linux-kernel - [PATCH] mm/vmalloc.c: Fix "unused function" warning

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Date:   Sat, 29 Jan 2022 11:46:52 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH] mm/vmalloc.c: Fix "unused function" warning

compute_subtree_max_size() is unused, when building with
DEBUG_AUGMENT_PROPAGATE_CHECK=y.

mm/vmalloc.c:785:1: warning: unused function 'compute_subtree_max_size'
[-Wunused-function].

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
 mm/vmalloc.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 028ce2b9bbf9..42d37b4bd351 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -778,17 +778,6 @@ get_subtree_max_size(struct rb_node *node)
 	return va ? va->subtree_max_size : 0;
 }
 
-/*
- * Gets called when remove the node and rotate.
- */
-static __always_inline unsigned long
-compute_subtree_max_size(struct vmap_area *va)
-{
-	return max3(va_size(va),
-		get_subtree_max_size(va->rb_node.rb_left),
-		get_subtree_max_size(va->rb_node.rb_right));
-}
-
 RB_DECLARE_CALLBACKS_MAX(static, free_vmap_area_rb_augment_cb,
 	struct vmap_area, rb_node, unsigned long, subtree_max_size, va_size)
 
@@ -978,6 +967,17 @@ unlink_va(struct vmap_area *va, struct rb_root *root)
 }
 
 #if DEBUG_AUGMENT_PROPAGATE_CHECK
+/*
+ * Gets called when remove the node and rotate.
+ */
+static __always_inline unsigned long
+compute_subtree_max_size(struct vmap_area *va)
+{
+	return max3(va_size(va),
+		get_subtree_max_size(va->rb_node.rb_left),
+		get_subtree_max_size(va->rb_node.rb_right));
+}
+
 static void
 augment_tree_propagate_check(void)
 {
-- 
2.20.1.7.g153144c