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Sun, 24 Sep 2023 20:58:41 -0700 (PDT) Received: from GL4FX4PXWL.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id fm1-20020a056a002f8100b00679a4b56e41sm7025387pfb.43.2023.09.24.20.58.34 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sun, 24 Sep 2023 20:58:40 -0700 (PDT) From: Peng Zhang To: Liam.Howlett@oracle.com, corbet@lwn.net, akpm@linux-foundation.org, willy@infradead.org, brauner@kernel.org, surenb@google.com, michael.christie@oracle.com, mjguzik@gmail.com, mathieu.desnoyers@efficios.com, npiggin@gmail.com, peterz@infradead.org, oliver.sang@intel.com Cc: zhangpeng.00@bytedance.com, maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v3 8/9] maple_tree: Preserve the tree attributes when destroying maple tree Date: Mon, 25 Sep 2023 11:56:16 +0800 Message-Id: <20230925035617.84767-9-zhangpeng.00@bytedance.com> X-Mailer: git-send-email 2.37.0 (Apple Git-136) In-Reply-To: <20230925035617.84767-1-zhangpeng.00@bytedance.com> References: <20230925035617.84767-1-zhangpeng.00@bytedance.com> MIME-Version: 1.0 X-Rspam-User: X-Stat-Signature: uu8ijpmcmumj5xbw3zbnrurnagj1yqm9 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 89DFE4002A X-HE-Tag: 1695614322-403878 X-HE-Meta: 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 c8P0/+iv D9e9jxm2Lz6FCFcWhrRwp5yj7mLBMwJWWhwoUZLxAlwDv3WaNqa5I4mgoHh8Fei37d2jucc9oQoQFHVkII9zQ2H8baVasGr8cVS8mlSHPuDodbOqHJdHpvRLXoONofHyVEtuWrv7979iRGsJ6Ff8Lbsv3PlAg7rnFaWG/46SKf8wtvHf7M7+DeW4GMw62wuf8gVe7pquvG8yzONKtwdpuhbpaFAO8SW60JaaYRCLRZRU1L9BvpFULHDIPD7rdkZlpunuD2j3rABU9zSp85Y5+BBE2uYL3plwC3FFDa20sIdPod4MzrCZ2GXZU2hbJCy6CujSsJqYWs15NtlLfMWTaniwyLIXi/Q7JHxttaqatF2FsahDURZPmOR/YoZ+83H6yxaDkdFfcCRUlmCd0RqYMSZ3HusQUob1DVN9Mljlv5y/H5S36qj38G/QF02xYgBiKLMHoxm6lV5KCy1hfV8VLc/QWFw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: When destroying maple tree, preserve its attributes and then turn it into an empty tree. This allows it to be reused without needing to be reinitialized. Signed-off-by: Peng Zhang --- lib/maple_tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index ed8847b4f1ff..ad06105f1a54 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -6670,7 +6670,7 @@ void __mt_destroy(struct maple_tree *mt) if (xa_is_node(root)) mte_destroy_walk(root, mt); - mt->ma_flags = 0; + mt->ma_flags = mt_attr(mt); } EXPORT_SYMBOL_GPL(__mt_destroy);