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Howlett" To: Andrew Morton Cc: maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Liam R. Howlett" Subject: [PATCH 06/14] maple_tree: Introduce __mas_set_range() Date: Wed, 31 May 2023 22:15:57 -0400 Message-Id: <20230601021605.2823123-7-Liam.Howlett@oracle.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230601021605.2823123-1-Liam.Howlett@oracle.com> References: <20230601021605.2823123-1-Liam.Howlett@oracle.com> X-ClientProxiedBy: YT3PR01CA0078.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:84::9) To SN6PR10MB3022.namprd10.prod.outlook.com (2603:10b6:805:d8::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN6PR10MB3022:EE_|SJ0PR10MB4687:EE_ X-MS-Office365-Filtering-Correlation-Id: 782a978f-7a23-4a19-cecb-08db62463700 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR10MB3022.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(396003)(39860400002)(136003)(346002)(376002)(366004)(451199021)(36756003)(38100700002)(86362001)(8936002)(8676002)(41300700001)(107886003)(5660300002)(26005)(1076003)(6506007)(6512007)(2906002)(186003)(2616005)(83380400001)(6666004)(6486002)(66556008)(66476007)(66946007)(316002)(478600001)(6916009)(4326008);DIR:OUT;SFP:1101; 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This is unnecessary when the maple state is already at the correct location of the write. Add a function that only sets the range to avoid unnecessary re-walking of the tree. Signed-off-by: Liam R. Howlett --- include/linux/maple_tree.h | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h index 295548cca8b3..ed50d8f459e6 100644 --- a/include/linux/maple_tree.h +++ b/include/linux/maple_tree.h @@ -531,6 +531,22 @@ static inline void mas_reset(struct ma_state *mas) */ #define mas_for_each(__mas, __entry, __max) \ while (((__entry) = mas_find((__mas), (__max))) != NULL) +/** + * __mas_set_range() - Set up Maple Tree operation state to a sub-range of the + * current location. + * @mas: Maple Tree operation state. + * @start: New start of range in the Maple Tree. + * @last: New end of range in the Maple Tree. + * + * set the internal maple state values to a sub-range. + * Please use mas_set_range() if you do not know where you are in the tree. + */ +static inline void __mas_set_range(struct ma_state *mas, unsigned long start, + unsigned long last) +{ + mas->index = start; + mas->last = last; +} /** * mas_set_range() - Set up Maple Tree operation state for a different index. @@ -545,9 +561,8 @@ static inline void mas_reset(struct ma_state *mas) static inline void mas_set_range(struct ma_state *mas, unsigned long start, unsigned long last) { - mas->index = start; - mas->last = last; - mas->node = MAS_START; + __mas_set_range(mas, start, last); + mas->node = MAS_START; } /**