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Howlett" Cc: Andrew Morton , maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, pedro.falcato@gmail.com, stable Subject: Re: [PATCH 2/2] maple_tree: Add MAS_UNDERFLOW and MAS_OVERFLOW states Message-ID: References: <20230921181236.509072-1-Liam.Howlett@oracle.com> <20230921181236.509072-3-Liam.Howlett@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230921181236.509072-3-Liam.Howlett@oracle.com> X-Rspamd-Queue-Id: E453814000E X-Rspam-User: X-Stat-Signature: 1k75atkff4rtqxfetz9o1xicwptuzku5 X-Rspamd-Server: rspam03 X-HE-Tag: 1695321639-259867 X-HE-Meta: U2FsdGVkX1+zDXFDBsi7JkGqcikMcbuECORRQ3qkCYy2bKBPF7FkFzuAamHQnlKf3a/EtniznTQ+A9YHrJb73fkI/ThV2wu5CGjG2dQYkbO1Xkva6bQRSuTJFdRJ2mBQwD+lzw1pQxYK8T/rSaSaD0xpE2PNhLdfOdgS40frXu2QxVo32Lk6S7yjAC87S6gNOVH2sZJgBb+H71C/Pcfj+YUSfCFmJv1NSpHZcKN7aqof6owkn1vXXXEUyaGG7eC16buAfUKmEFoNmsgEeghC+qGlcmUNBsfRknoF7oftkLvn2gGgrPfDY9+Bgaqd0eD6wurXFkm15r1SCJNvnCs9I/W6uOEQOC5ZhDw9Zp5FpXKaqOvcoQhjxpBnGwgtccCfG2eCEdJOZWpwuBM1KAk+sZOGepXCANTfRrCVi/cUnmIh/GtkZjXVwlJF5l9q5DtN/ExNQPBWI3caqpkrHhmp1TFPH9AUEodpoyc6+OuDAqcHqsn/uWYATVQkg0LdDsb4Hg1YqWm/uzY3xPJ0JQI/HOcrq6rZxhY3tBh+//Ai2W1k7nCoJ6ECoH5znYTOlIndNO2bzrIlRsposBTjGiKxjemCQX7WWRGsL0IpR9/ySiLCUEJ79YqKG3lBYbIEKqKR30vZwQRzIfUau0z9KriTKXkqglfMjyjwD4Ivep+ZeBAUCjwyIIb79GKkznqmLdfIpw+Cv0E8xjvUAOgy+8QasNiq1CuLxBjFdOqTcLdCZyyEQqT3RTAIP8j2nmuCNTGkZUn4x0HAv3tF1hISS+M/NwJS+BNeEl4GybOqx6d642a/F6AVPmchHa7tYr6AUxZ4QBBDybUKGkl09PeNu+JSYjbt62BMslglA9ea7cbOBTTqO/aVxLFJVpgXAiLFafRM6ecOm68/TXQOUle8iM2Bc6ZJfWaOwdoiVZOFrfhD/jvHAxrJkqei0Vyuob4xH0dJysdU689JorerAK/Za++ uJWllko6 8QaiqXT8KOvoFQbShQrrR073WgSvHhbJ4c6F8+1tYrCUNbuawkQm0vVdLhfUCXMGTc3f1T4fDqvyv63R2YLiRg04Y296VHv2eZR6d5yfwWam/9hDZOQ4AQPhqCEajgqcuCYASXhJ1UVMVfsQihBKNWEHYlH/ZFHqYXaV1IetmjbtyNPtTddH0wHQjZEtof3RmyVHZUZXZmx+TmhZgcVVnr+oFIW+6MB/tdqmrF8J3tJt+T5sNq6I2egmKAUs6BfHyZ1hZ 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: On Thu, Sep 21, 2023 at 02:12:36PM -0400, Liam R. Howlett wrote: > Since MAS_NONE is used for handling of the maple tree when it's a single > entry at 0 (just a pointer), changing the handling of MAS_NONE in > mas_find() would make the code more complicated and error prone. Single entry at index 0 is MAS_ROOT, not MAS_NONE.