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b=YE6jrEPKl4RAL4TzmBlLqe2nKox5hw1ncpUW19Ztk+DhB2aI9E3axKvJSuT6Q5AGt BMeKNElGJJR3OXX8C/S0vuZiCH8UtKO6YiCNFIuNyjFRJXBlBKYbTVCz/qr0LYNFXO WRQ8N1GUu3n9TknQ7WQ6BndbHRZkTxHm+TDpxm7g= Date: Thu, 22 Jan 2026 13:23:35 -0800 From: Andrew Morton To: kernel test robot Cc: Lorenzo Stoakes , oe-kbuild-all@lists.linux.dev, David Hildenbrand , Linux Memory Management List Subject: Re: [akpm-mm:mm-new 420/429] fs/romfs/mmap-nommu.c:66:42: sparse: sparse: dereference of noderef expression Message-Id: <20260122132335.5f3160dd20dfdb68c57ede35@linux-foundation.org> In-Reply-To: <202601221505.RxftadLx-lkp@intel.com> References: <202601221505.RxftadLx-lkp@intel.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: E3CD0100007 X-Stat-Signature: 88kjnof1o1o4bm7e6k34nsn4qhnyi4xo X-Rspam-User: X-HE-Tag: 1769117017-947037 X-HE-Meta: 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 Ti+FjdCF BKVq2njRMYaN8WXP/PlHb4RyxDp1NPrZSMAOliuYXEpjuF8c6j3lcEQr/9XTgkTWd/4FGaToUPAHOAMFbKmWcMIovO56KngAbV8FJ+xHp1YOE1A49MscLIbPTy2NjUnpJcIIQog1GmJUqE0KW2gdfcfIGZAlYk3lbGbAiUT+1pzbwnN5x6Szrx6w7yjmi2VhqoZsV23xfkTrzqrV/Sg4FwcEHzXymWDjHTp2+P9BPe/pGGdy1RMXw1WRqK4jmOCV51hF905/rvZqvkP2r5a45prbuW6cfjSEMxTm6acTsmGzduAqxb1+ayURFsRJ5dj7ryJtM X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 22 Jan 2026 16:04:37 +0800 kernel test robot wrote: > Hi Lorenzo, > > FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant. > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new > head: dc4fe40a11269aead253fa0beb098b00417b8694 > commit: 57a654376d4bb67119d436edc8c3c4c0ecb3c369 [420/429] mm: update all remaining mmap_prepare users to use vma_flags_t > config: sh-randconfig-r122-20260122 (https://download.01.org/0day-ci/archive/20260122/202601221505.RxftadLx-lkp@intel.com/config) Has CONFIG_NOMMU=y > compiler: sh4-linux-gcc (GCC) 13.4.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260122/202601221505.RxftadLx-lkp@intel.com/reproduce) > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-kbuild-all/202601221505.RxftadLx-lkp@intel.com/ > > sparse warnings: (new ones prefixed by >>) > >> fs/romfs/mmap-nommu.c:66:42: sparse: sparse: dereference of noderef expression fs/romfs/Makefile has ifneq ($(CONFIG_MMU),y) romfs-$(CONFIG_ROMFS_ON_MTD) += mmap-nommu.o endif so why is mmap-nommu.o being compiled in this testing??