linux-kernel - Re: [PATCH] afs: fix no return statement in function returning non-void

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Message-ID: <929460.1623850895@warthog.procyon.org.uk>
Date:   Wed, 16 Jun 2021 14:41:35 +0100
From:   David Howells <dhowells@...hat.com>
To:     Tom Rix <trix@...hat.com>
Cc:     dhowells@...hat.com, Zheng Zengkai <zhengzengkai@...wei.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Hulk Robot <hulkci@...wei.com>, linux-afs@...ts.infradead.org,
        Marc Dionne <marc.dionne@...istor.com>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] afs: fix no return statement in function returning non-void

Tom Rix <trix@...hat.com> wrote:

> A fix is to use the __noreturn attribute on this function and not add a return
> like this
> 
> -static int afs_dir_set_page_dirty(struct page *page)
> +static int __noreturn afs_dir_set_page_dirty(struct page *page)
> 
> and to the set of ~300 similar functions in these files.

BUG() really ought to handle it.  Do you have CONFIG_BUG=y?

David