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Wed, 19 Nov 2025 04:37:12 -0800 (PST) Date: Wed, 19 Nov 2025 15:37:09 +0300 From: Dan Carpenter To: oe-kbuild@lists.linux.dev, Wei Yang , willy@infradead.org, akpm@linux-foundation.org, david@kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev Cc: lkp@intel.com, oe-kbuild-all@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Wei Yang Subject: Re: [PATCH] mm/huge_memory: consolidate order-related checks into folio_split_supported() Message-ID: <202511151652.GKPwEctt-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251114075703.10434-1-richard.weiyang@gmail.com> X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: D5BD71A0005 X-Stat-Signature: e3bbiwj9eigf6ou8r4neu9nwikcj148f X-HE-Tag: 1763555834-348548 X-HE-Meta: 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 tnzrOjXl 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 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 Wei, kernel test robot noticed the following build warnings: url: https://github.com/intel-lab-lkp/linux/commits/Wei-Yang/mm-huge_memory-consolidate-order-related-checks-into-folio_split_supported/20251114-155833 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20251114075703.10434-1-richard.weiyang%40gmail.com patch subject: [PATCH] mm/huge_memory: consolidate order-related checks into folio_split_supported() config: i386-randconfig-141-20251115 (https://download.01.org/0day-ci/archive/20251115/202511151652.GKPwEctt-lkp@intel.com/config) compiler: gcc-12 (Debian 12.4.0-5) 12.4.0 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 | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202511151652.GKPwEctt-lkp@intel.com/ smatch warnings: mm/huge_memory.c:3696 folio_split_supported() warn: signedness bug returning '(-22)' vim +3696 mm/huge_memory.c aa27253af32c74 Wei Yang 2025-11-06 3690 bool folio_split_supported(struct folio *folio, unsigned int new_order, ^^^^ This is a bool function. aa27253af32c74 Wei Yang 2025-11-06 3691 enum split_type split_type, bool warns) 58729c04cf1092 Zi Yan 2025-03-07 3692 { ab62f1bb0caaa5 Wei Yang 2025-11-14 3693 const int old_order = folio_order(folio); ab62f1bb0caaa5 Wei Yang 2025-11-14 3694 ab62f1bb0caaa5 Wei Yang 2025-11-14 3695 if (new_order >= old_order) ab62f1bb0caaa5 Wei Yang 2025-11-14 @3696 return -EINVAL; s/-EINVAL/false/ ab62f1bb0caaa5 Wei Yang 2025-11-14 3697 58729c04cf1092 Zi Yan 2025-03-07 3698 if (folio_test_anon(folio)) { 58729c04cf1092 Zi Yan 2025-03-07 3699 /* order-1 is not supported for anonymous THP. */ 58729c04cf1092 Zi Yan 2025-03-07 3700 VM_WARN_ONCE(warns && new_order == 1, 58729c04cf1092 Zi Yan 2025-03-07 3701 "Cannot split to order-1 folio"); 28753037121116 Zi Yan 2025-11-05 3702 if (new_order == 1) 28753037121116 Zi Yan 2025-11-05 3703 return false; -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki