linux-kernel - [PATCH 01/43] maple_tree: Add mas

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Date:   Tue, 29 Nov 2022 16:44:20 +0000
From:   Liam Howlett <liam.howlett@...cle.com>
To:     "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     Liam Howlett <liam.howlett@...cle.com>,
        Liam Howlett <liam.howlett@...cle.com>
Subject: [PATCH 01/43] maple_tree: Add mas_init() function

From: "Liam R. Howlett" <Liam.Howlett@...cle.com>

Add a function that will zero out the maple state struct and set some
basic defaults.

Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
---
 include/linux/maple_tree.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h
index e594db58a0f1..3f972602c978 100644
--- a/include/linux/maple_tree.h
+++ b/include/linux/maple_tree.h
@@ -433,6 +433,7 @@ struct ma_wr_state {
 		.min = 0,						\
 		.max = ULONG_MAX,					\
 		.alloc = NULL,						\
+		.mas_flags = 0,						\
 	}
 
 #define MA_WR_STATE(name, ma_state, wr_entry)				\
@@ -471,6 +472,16 @@ void *mas_next(struct ma_state *mas, unsigned long max);
 int mas_empty_area(struct ma_state *mas, unsigned long min, unsigned long max,
 		   unsigned long size);
 
+static inline void mas_init(struct ma_state *mas, struct maple_tree *tree,
+			    unsigned long addr)
+{
+	memset(mas, 0, sizeof(struct ma_state));
+	mas->tree = tree;
+	mas->index = mas->last = addr;
+	mas->max = ULONG_MAX;
+	mas->node = MAS_START;
+}
+
 /* Checks if a mas has not found anything */
 static inline bool mas_is_none(struct ma_state *mas)
 {
-- 
2.35.1