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Howlett" Subject: [PATCH] maple_tree: root node could be handled by !p_slot too Date: Fri, 13 Sep 2024 06:31:28 +0000 Message-Id: <20240913063128.27391-1-richard.weiyang@gmail.com> X-Mailer: git-send-email 2.11.0 X-Rspam-User: X-Rspamd-Queue-Id: 3AF07A0002 X-Rspamd-Server: rspam01 X-Stat-Signature: q6pqgra83o7ckwqg9c5395asj1dyz76i X-HE-Tag: 1726209093-702955 X-HE-Meta: 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 YBrP0yyY 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000063, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: For a root node, mte_parent_slot() return 0, this exactly fits the following !p_slot check. So we can remove the special handling for root node. Signed-off-by: Wei Yang CC: Liam R. Howlett --- lib/maple_tree.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 85bd651e7770..b5dde94cc7a9 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -2100,9 +2100,7 @@ static inline bool mas_prev_sibling(struct ma_state *mas) { unsigned int p_slot = mte_parent_slot(mas->node); - if (mte_is_root(mas->node)) - return false; - + /* For root node, p_slot is set to 0 by mte_parent_slot(). */ if (!p_slot) return false;