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[209.85.208.170]) by smtp.gmail.com with ESMTPSA id x17sm297820ljx.75.2021.06.16.07.34.33 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 16 Jun 2021 07:34:33 -0700 (PDT) Received: by mail-lj1-f170.google.com with SMTP id d2so4116965ljj.11 for ; Wed, 16 Jun 2021 07:34:33 -0700 (PDT) X-Received: by 2002:a2e:9ad5:: with SMTP id p21mr138537ljj.220.1623854073071; Wed, 16 Jun 2021 07:34:33 -0700 (PDT) MIME-Version: 1.0 References: <162375813191.653958.11993495571264748407.stgit@warthog.procyon.org.uk> <051421e0-afe8-c6ca-95cd-4dc8cd20a43e@huawei.com> <200ea6f7-0182-9da1-734c-c49102663ccc@redhat.com> In-Reply-To: <200ea6f7-0182-9da1-734c-c49102663ccc@redhat.com> From: Linus Torvalds Date: Wed, 16 Jun 2021 07:34:16 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] afs: fix no return statement in function returning non-void To: Tom Rix Cc: Zheng Zengkai , Randy Dunlap , David Howells , Hulk Robot , linux-afs@lists.infradead.org, Marc Dionne , linux-fsdevel , Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 16, 2021 at 5:56 AM Tom Rix wrote: > > A fix is to use the __noreturn attribute on this function That's certainly a better thing. It would be better yet to figure out why BUG() didn't do it automatically. Without CONFIG_BUG, it looks like powerpc picks up #ifndef HAVE_ARCH_BUG #define BUG() do {} while (1) which should still make it pointless to have the return. But I might have missed something. Linus