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Fri, 29 May 2020 16:54:31 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 75A8D301A80; Fri, 29 May 2020 18:54:19 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id E64EE2BB51403; Fri, 29 May 2020 18:54:19 +0200 (CEST) Date: Fri, 29 May 2020 18:54:19 +0200 From: Peter Zijlstra To: Josh Poimboeuf Cc: Christoph Hellwig , Randy Dunlap , Andrew Morton , broonie@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-next@vger.kernel.org, mhocko@suse.cz, mm-commits@vger.kernel.org, sfr@canb.auug.org.au, Linus Torvalds , viro@zeniv.linux.org.uk, x86@kernel.org, Steven Rostedt Subject: Re: mmotm 2020-05-13-20-30 uploaded (objtool warnings) Message-ID: <20200529165419.GF706460@hirez.programming.kicks-ass.net> References: <20200514033104.kRFL_ctMQ%akpm@linux-foundation.org> <611fa14d-8d31-796f-b909-686d9ebf84a9@infradead.org> <20200528172005.GP2483@worktop.programming.kicks-ass.net> <20200529135750.GA1580@lst.de> <20200529143556.GE706478@hirez.programming.kicks-ass.net> <20200529145325.GB706518@hirez.programming.kicks-ass.net> <20200529153336.GC706518@hirez.programming.kicks-ass.net> <20200529160514.cyaytn33thphb3tz@treble> <20200529161253.GD706460@hirez.programming.kicks-ass.net> <20200529165011.o7vvhn4wcj6zjxux@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200529165011.o7vvhn4wcj6zjxux@treble> X-Rspamd-Queue-Id: 9B21C180442C7 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 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 Fri, May 29, 2020 at 11:50:11AM -0500, Josh Poimboeuf wrote: > The nested likelys seem like overkill anyway -- user_access_begin() is > __always_inline and it already has unlikely(), which should be > propagated. > > So just remove the outer likelys? That fixes it. Ack! > diff --git a/arch/x86/lib/csum-wrappers_64.c b/arch/x86/lib/csum-wrappers_64.c > index a12b8629206d..ee63d7576fd2 100644 > --- a/arch/x86/lib/csum-wrappers_64.c > +++ b/arch/x86/lib/csum-wrappers_64.c > @@ -27,7 +27,7 @@ csum_and_copy_from_user(const void __user *src, void *dst, > might_sleep(); > *errp = 0; > > - if (!likely(user_access_begin(src, len))) > + if (!user_access_begin(src, len)) > goto out_err; > > /* > @@ -89,7 +89,7 @@ csum_and_copy_to_user(const void *src, void __user *dst, > > might_sleep(); > > - if (unlikely(!user_access_begin(dst, len))) { > + if (!user_access_begin(dst, len)) { > *errp = -EFAULT; > return 0; > } >