From patchwork Wed Feb 5 08:17:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zenghui Yu X-Patchwork-Id: 11365873 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BCB5614E3 for ; Wed, 5 Feb 2020 08:19:07 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2EF072082E for ; Wed, 5 Feb 2020 08:19:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2EF072082E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:42680 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1izFtq-0005A5-1V for patchwork-qemu-devel@patchwork.kernel.org; Wed, 05 Feb 2020 03:19:06 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40267) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1izFsr-0004JJ-29 for qemu-devel@nongnu.org; Wed, 05 Feb 2020 03:18:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1izFso-0001GU-UN for qemu-devel@nongnu.org; Wed, 05 Feb 2020 03:18:04 -0500 Received: from szxga07-in.huawei.com ([45.249.212.35]:49488 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1izFso-00008Z-Go for qemu-devel@nongnu.org; Wed, 05 Feb 2020 03:18:02 -0500 Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id A9FAA1D3A8B16BED7293; Wed, 5 Feb 2020 16:17:44 +0800 (CST) Received: from DESKTOP-8RFUVS3.china.huawei.com (10.173.222.27) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.439.0; Wed, 5 Feb 2020 16:17:36 +0800 From: Zenghui Yu To: , , Subject: [PATCH] memory: Use QEMU_ALWAYS_INLINE to silence compile-time warning Date: Wed, 5 Feb 2020 16:17:03 +0800 Message-ID: <20200205081703.631-1-yuzenghui@huawei.com> X-Mailer: git-send-email 2.23.0.windows.1 MIME-Version: 1.0 X-Originating-IP: [10.173.222.27] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 45.249.212.35 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zenghui Yu , wanghaibin.wang@huawei.com, qemu-devel@nongnu.org, Euler Robot Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Our robot reported the following compile-time warning while compiling Qemu with -fno-inline cflags: In function 'load_memop', inlined from 'load_helper' at /qemu/accel/tcg/cputlb.c:1578:20, inlined from 'full_ldub_mmu' at /qemu/accel/tcg/cputlb.c:1624:12: /qemu/accel/tcg/cputlb.c:1502:9: error: call to 'qemu_build_not_reached' declared with attribute error: code path is reachable qemu_build_not_reached(); ^~~~~~~~~~~~~~~~~~~~~~~~ [...] It looks like a false-positive because only (MO_UB ^ MO_BSWAP) will hit the default case in load_memop() while need_swap (size > 1) has already ensured that MO_UB is not involved. Apply QEMU_ALWAYS_INLINE on memop_size() to make sure it will always be inlined while we're using the compile-time assert, so that the compilers won't get confused. Reported-by: Euler Robot Signed-off-by: Zenghui Yu --- Not sure if it's the right fix, but seems works fine to me :) include/exec/memop.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/exec/memop.h b/include/exec/memop.h index 529d07b02d..5403f960e0 100644 --- a/include/exec/memop.h +++ b/include/exec/memop.h @@ -110,7 +110,7 @@ typedef enum MemOp { } MemOp; /* MemOp to size in bytes. */ -static inline unsigned memop_size(MemOp op) +static inline unsigned QEMU_ALWAYS_INLINE memop_size(MemOp op) { return 1 << (op & MO_SIZE); }