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Tue, 19 Feb 2019 15:30:29 -0800 Received: from IN01WEHTCB.internal.synopsys.com (10.144.199.105) by IN01WEHTCA.internal.synopsys.com (10.144.199.103) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 20 Feb 2019 05:00:32 +0530 Received: from [10.10.161.59] (10.10.161.59) by IN01WEHTCB.internal.synopsys.com (10.144.199.243) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 20 Feb 2019 05:00:32 +0530 Subject: Re: [PATCH] ARC: Explicitly set ARCH_SLAB_MINALIGN = 8 To: Alexey Brodkin CC: David Laight , "linux-snps-arc@lists.infradead.org" , Arnd Bergmann , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" , Mark Rutland , Peter Zijlstra Newsgroups: gmane.linux.kernel.stable,gmane.linux.kernel.arc,gmane.linux.kernel References: <20190208105519.26750-1-abrodkin@synopsys.com> <81017fe4-b31f-4942-e822-a7b70008b74d@synopsys.com> <20190213125651.GP32494@hirez.programming.kicks-ass.net> <4881796E12491D4BB15146FE0209CE64681DB01F@DE02WEMBXB.internal.synopsys.com> <4881796E12491D4BB15146FE0209CE64681EECE5@DE02WEMBXB.internal.synopsys.com> From: Vineet Gupta Openpgp: preference=signencrypt Autocrypt: addr=vgupta@synopsys.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <4881796E12491D4BB15146FE0209CE64681EECE5@DE02WEMBXB.internal.synopsys.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.10.161.59] Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/18/19 12:53 AM, Alexey Brodkin wrote: > So are you OK with this patch or something should be done before applying? Or your original patch was +#ifdef CONFIG_ARC_HAS_LL64 +#define ARCH_SLAB_MINALIGN 8 +#endif I don't think this issue is related to LL64 at all. A long long on ARC could be 4 byte aligned (as mandated by the ABI). It could use LDD or 2 separate LDs. This has no bearing on the fact that LLOCKD have to use a 64-bit aligned addresses. So I think we should just do this unconditionally. Agree ?