linux-kernel - [PATCH] maple_tree: shrink struct maple

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Message-Id: <20230821225145.2169848-1-mjguzik@gmail.com>
Date:   Tue, 22 Aug 2023 00:51:45 +0200
From:   Mateusz Guzik <mjguzik@...il.com>
To:     Liam.Howlett@...cle.com
Cc:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, maple-tree@...ts.infradead.org,
        Mateusz Guzik <mjguzik@...il.com>
Subject: [PATCH] maple_tree: shrink struct maple_tree from 24 to 16 bytes on LP64

by plugging a padding hole.

[sounds like an obvious thing to do, am I missing something?]

Signed-off-by: Mateusz Guzik <mjguzik@...il.com>
---
 include/linux/maple_tree.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h
index 295548cca8b3..5bdd3ce34cb9 100644
--- a/include/linux/maple_tree.h
+++ b/include/linux/maple_tree.h
@@ -212,8 +212,8 @@ struct maple_tree {
 		spinlock_t	ma_lock;
 		lockdep_map_p	ma_external_lock;
 	};
-	void __rcu      *ma_root;
 	unsigned int	ma_flags;
+	void __rcu      *ma_root;
 };
 
 /**
-- 
2.39.2