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McKenney" , Matthew Wilcox , Laurent Dufour , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Michel Lespinasse Subject: Re: [PATCH 26/94] Maple Tree: Add new data structure Message-ID: References: <20210428153542.2814175-1-Liam.Howlett@Oracle.com> <20210428153542.2814175-27-Liam.Howlett@Oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210428153542.2814175-27-Liam.Howlett@Oracle.com> Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=infradead.org header.s=desiato.20200630 header.b=SjYjoZzs; dmarc=none; spf=none (imf05.hostedemail.com: domain of peterz@infradead.org has no SPF policy when checking 90.155.92.199) smtp.mailfrom=peterz@infradead.org X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 37BF6E00010F X-Stat-Signature: tr3wbswausywjhjr5b6wgedhysfsbm9j X-HE-Tag: 1620988860-816659 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 Wed, Apr 28, 2021 at 03:36:02PM +0000, Liam Howlett wrote: > +/* Flags: > + * MAPLE_ALLOC_RANGE Use allocation ranges (tracks gaps) in this tree > + * MAPLE_USE_RCU Operate in read/copy/update mode for multi-readers. > + * MAPLE_HEIGHT_OFFSET The position of the tree height in the flags > + * MAPLE_HEIGHT_MASK The mask for the maple tree height value. > + */ Regular comment style would be: /* * Flags: ... */ > +#define MAPLE_ALLOC_RANGE 1 // Bit 0 > +#define MAPLE_USE_RCU 2 // Bit 1 > +#define MAPLE_HEIGHT_OFFSET 2 // Bit 2 > +#define MAPLE_HEIGHT_MASK 60 // Bits 2-5 Can we pretty please keep masks in hex, like: #define MAPLE_HEIGHT_MASK 0x3c Because then it's instantly obvious is it bits 2-5.