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X-CSE-ConnectionGUID: OKTEkqYCQ9a1Unz8Ojhm7w== X-CSE-MsgGUID: WKhwt5e6QDqd+V7tmfh0mQ== X-IronPort-AV: E=McAfee;i="6600,9927,11039"; a="7987503" X-IronPort-AV: E=Sophos;i="6.07,190,1708416000"; d="scan'208";a="7987503" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2024 08:35:10 -0700 X-CSE-ConnectionGUID: pX1/nI07QWGvh/Uqi6DMLw== X-CSE-MsgGUID: 448c7hfOTSCX7W6p/l95+A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,190,1708416000"; d="scan'208";a="43856038" Received: from ahunter6-mobl1.ger.corp.intel.com (HELO [10.0.2.15]) ([10.251.214.234]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2024 08:35:06 -0700 Message-ID: Date: Wed, 10 Apr 2024 18:35:01 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: tinyconfig: kernel/time/timekeeping.c:286:1: error: no return statement in function returning non-void [-Werror=return-type] From: Adrian Hunter To: Naresh Kamboju , open list , lkft-triage@lists.linaro.org, Linux Regressions Cc: Thomas Gleixner , Stephen Boyd , John Stultz , Arnd Bergmann , Dan Carpenter , Anders Roxell References: <52cf2d1a-76ec-48cb-96c3-211fa1eb721a@intel.com> Content-Language: en-US Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki In-Reply-To: <52cf2d1a-76ec-48cb-96c3-211fa1eb721a@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/04/24 16:03, Adrian Hunter wrote: > On 10/04/24 13:56, Naresh Kamboju wrote: >> The powerpc,s390, superSh and sparc tinyconfig builds failed due to >> following build >> warnings / errors on the Linux next-20240410 with gcc-13 and gcc-11. >> >> List build failures: >> --- >> * s390, build >> - gcc-13-tinyconfig - failed >> - gcc-8-tinyconfig - failed >> >> * sh, build >> - gcc-11-tinyconfig - failed >> >> * sparc, build >> - gcc-11-tinyconfig - failed >> >> * mips, build >> - gcc-12-tinyconfig - failed >> - gcc-8-tinyconfig - failed >> >> * powerpc, build >> - gcc-13-tinyconfig - failed >> - gcc-8-tinyconfig - failed >> >> Reported-by: Linux Kernel Functional Testing >> >> Build log: >> -------- >> kernel/time/timekeeping.c: In function 'timekeeping_debug_get_ns': >> kernel/time/timekeeping.c:286:1: error: no return statement in >> function returning non-void [-Werror=return-type] >> 286 | } >> | ^ >> cc1: some warnings being treated as errors > > Using unreachable() in the default BUG() seems to make this go > away. > > diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h > index 6e794420bd39..891bd9b0be70 100644 > --- a/include/asm-generic/bug.h > +++ b/include/asm-generic/bug.h > @@ -156,7 +156,7 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...); > > #else /* !CONFIG_BUG */ > #ifndef HAVE_ARCH_BUG > -#define BUG() do {} while (1) > +#define BUG() do { do {} while (1) ; unreachable(); } while (0) > #endif > > #ifndef HAVE_ARCH_BUG_ON > Patch here: https://lore.kernel.org/all/20240410153212.127477-1-adrian.hunter@intel.com/