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Wysocki" , Danilo Krummrich , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , houtao1@huawei.com Subject: Re: [PATCH 03/13] kernfs: add support for get_unmapped_area callback Message-ID: <202512202338.qFqw6FI8-lkp@intel.com> References: <20251220040446.274991-4-houtao@huaweicloud.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251220040446.274991-4-houtao@huaweicloud.com> X-Rspam-User: X-Rspamd-Queue-Id: 1A81C1C0006 X-Rspamd-Server: rspam04 X-Stat-Signature: wzdwggjn1a1t4frfpq9dribxobx8tfaf X-HE-Tag: 1766246245-210732 X-HE-Meta: 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 wiaj76MC qDdN/QLp/Lf2PXmJwnOaO6nkeLX7W5gMne88M5cyTcJWV0ZB9QubKUdMn/ehJSKbu5mxlHmwWfxqUZ9jhncQ/FMrDxoOilBA16yV2LALm2wKpD5xqPcghklRXa1Es4dLpBfBF6j0BV6FuLcaVuF40wPe8eJxHhfKfGUqiEDxOeEUQvjHOrvelnvaOlj6IRf7JQSDJsO1y2srpu11JymTCn9+wHH0upcd+GwGK/Dn3MTl1b91Cyy/0Y9NvNq+ox4gRMrWiE37E1NbE/TYNsyzJMZ30CqzK4UziMYOO68on6bD5h1nUZVKOytO5+C0bl+/k/8E8qeJkIFbYUVi8BWa2QvjYibbXkiUr0pc3hgnMyaf3shZ6LPWnCRBFIuKZboI6DpWCI/lBrW3KjOLtNQoV33U3+BPGflVz3PAyJ/QcN/jMDfk= 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: Hi Hou, kernel test robot noticed the following build errors: [auto build test ERROR on driver-core/driver-core-testing] [also build test ERROR on driver-core/driver-core-next driver-core/driver-core-linus akpm-mm/mm-everything linus/master v6.19-rc1 next-20251219] [cannot apply to pci/next pci/for-linus] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Hou-Tao/PCI-P2PDMA-Release-the-per-cpu-ref-of-pgmap-when-vm_insert_page-fails/20251220-121804 base: driver-core/driver-core-testing patch link: https://lore.kernel.org/r/20251220040446.274991-4-houtao%40huaweicloud.com patch subject: [PATCH 03/13] kernfs: add support for get_unmapped_area callback config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20251220/202512202338.qFqw6FI8-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project b324c9f4fa112d61a553bf489b5f4f7ceea05ea8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251220/202512202338.qFqw6FI8-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/202512202338.qFqw6FI8-lkp@intel.com/ All errors (new ones prefixed by >>): >> fs/kernfs/file.c:480:9: error: call to undeclared function 'mm_get_unmapped_area'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 480 | addr = mm_get_unmapped_area(file, uaddr, len, pgoff, flags); | ^ fs/kernfs/file.c:480:9: note: did you mean '__get_unmapped_area'? include/linux/mm.h:3671:1: note: '__get_unmapped_area' declared here 3671 | __get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, | ^ 1 error generated. vim +/mm_get_unmapped_area +480 fs/kernfs/file.c 456 457 static unsigned long kernfs_get_unmapped_area(struct file *file, unsigned long uaddr, 458 unsigned long len, unsigned long pgoff, 459 unsigned long flags) 460 { 461 struct kernfs_open_file *of = kernfs_of(file); 462 const struct kernfs_ops *ops; 463 long addr; 464 465 if (!(of->kn->flags & KERNFS_HAS_MMAP)) 466 return -ENODEV; 467 468 mutex_lock(&of->mutex); 469 470 addr = -ENODEV; 471 if (!kernfs_get_active_of(of)) 472 goto out_unlock; 473 474 ops = kernfs_ops(of->kn); 475 if (ops->get_unmapped_area) { 476 addr = ops->get_unmapped_area(of, uaddr, len, pgoff, flags); 477 if (!IS_ERR_VALUE(addr) || addr != -EOPNOTSUPP) 478 goto out_put; 479 } > 480 addr = mm_get_unmapped_area(file, uaddr, len, pgoff, flags); 481 482 out_put: 483 kernfs_put_active_of(of); 484 out_unlock: 485 mutex_unlock(&of->mutex); 486 487 return addr; 488 } 489 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki