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Thu, 26 May 2022 08:19:53 +0000 Received: from MWHPR1001MB2365.namprd10.prod.outlook.com ([fe80::86f:81ba:9951:5a7e]) by MWHPR1001MB2365.namprd10.prod.outlook.com ([fe80::86f:81ba:9951:5a7e%2]) with mapi id 15.20.5273.023; Thu, 26 May 2022 08:19:53 +0000 Date: Thu, 26 May 2022 11:19:28 +0300 From: Dan Carpenter To: Andrew Morton Cc: kernel test robot , virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-riscv@lists.infradead.org, linux-rdma@vger.kernel.org, linux-pci@vger.kernel.org, linux-parport@lists.infradead.org, linux-omap@vger.kernel.org, linux-mm@kvack.org, linux-fbdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, dri-devel@lists.freedesktop.org, bpf@vger.kernel.org, amd-gfx@lists.freedesktop.org, alsa-devel@alsa-project.org Subject: Re: [linux-next:master] BUILD REGRESSION 8cb8311e95e3bb58bd84d6350365f14a718faa6d Message-ID: <20220526081928.GB2146@kadam> References: <628ea118.wJYf60YnZco0hs9o%lkp@intel.com> <20220525145056.953631743a4c494aabf000dc@linux-foundation.org> Content-Type: text/plain; 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And from this report I can't > figure out what tool emitted it. Clang? This is a Smatch warning. I normally look over Smatch warnings before forwarding kbuild-bot emails but this email is a grab bag of static checker warnings from different tools. This warning has a high rate of false positives so I'm going to disable it by default. > > > > > ... > > > > |-- i386-randconfig-m021 > > | `-- mm-shmem.c-shmem_getpage_gfp()-warn:should-((()-)-)-folio_order(folio)-be-a-bit-type > > If you're going to use randconfig then shouldn't you make the config > available? Or maybe quote the KCONFIG_SEED - presumably there's a way > for others to regenerate. > > Anyway, the warning seems wrong to me. > > > #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) > > #define BLOCKS_PER_PAGE (PAGE_SIZE/512) > > inode->i_blocks += BLOCKS_PER_PAGE << folio_order(folio); > > so the RHS here should have unsigned long type. Being able to generate > the cpp output would be helpful. That requires the .config. The heuristic is that "inode->i_blocks" is a u64 but this .config must be for a 32bit CPU. I'm just going to turn off all these warnings until I can figure out a better heuristic. regards, dan carpenter