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Date:   Mon, 5 Dec 2022 22:27:58 -0800
From:   Christoph Hellwig <hch@infradead.org>
To:     Herbert Xu <herbert@gondor.apana.org.au>
Cc:     Christoph Hellwig <hch@infradead.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Ard Biesheuvel <ardb@kernel.org>,
        Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Linux Memory Management List <linux-mm@kvack.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        LinuxKernelMailingList@gondor.apana.org.au,
        linux-kernel@vger.kernel.org,
        "David S. Miller" <davem@davemloft.net>,
        Linux Crypto Mailing List <linux-crypto@vger.kernel.org>
Subject: Re: [PATCH 0/10] crypto: Driver conversions for DMA alignment
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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).