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Miller" , Linux Crypto Mailing List Subject: Re: [PATCH 0/10] crypto: Driver conversions for DMA alignment Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 34EF3C0003 X-Stat-Signature: 47cjymjir6ay8m35d8qk6kgjmwbdsz8h X-Spamd-Result: default: False [-4.57 / 9.00]; BAYES_HAM(-4.67)[96.92%]; FORGED_SENDER(0.30)[hch@infradead.org,BATV@bombadil.srs.infradead.org]; R_DKIM_ALLOW(-0.20)[infradead.org:s=bombadil.20210309]; RCVD_NO_TLS_LAST(0.10)[]; MIME_GOOD(-0.10)[text/plain]; R_SPF_NA(0.00)[no SPF record]; MID_RHS_MATCH_FROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_TWELVE(0.00)[16]; RCVD_COUNT_TWO(0.00)[2]; DKIM_TRACE(0.00)[infradead.org:+]; TO_MATCH_ENVRCPT_SOME(0.00)[]; ARC_SIGNED(0.00)[hostedemail.com:s=arc-20220608:i=1]; ARC_NA(0.00)[]; TAGGED_FROM(0.00)[9d56d5bbcc4ddfc66a45,7044,infradead.org,hch]; FROM_HAS_DN(0.00)[]; DMARC_NA(0.00)[infradead.org]; TO_DN_SOME(0.00)[]; FROM_NEQ_ENVFROM(0.00)[hch@infradead.org,BATV@bombadil.srs.infradead.org] X-Rspam-User: X-HE-Tag: 1670308101-561140 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 Tue, Dec 06, 2022 at 12:13:52PM +0800, Herbert Xu wrote: > Yes they're clearly bogus. Basically they are saying they want > memory that is aligned sufficiently for DMA. So if Catalin's > patch-set will break this assumption, then all the GFP_DMA allocations > in drivers/crypto will need to be enlarged to take this into > account. But GFP_DMA never did do anything at all about alignment. It picks allocations from ZONE_DMA (which on x86 is the first 16MB only).