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b=g2P9XDLlR6fNt+r+veog97du8CFM2oid3SHVXSPSzTpzh2iUsN7eF68ktocaew9Wt rJZdnIftvDAmeh+2+t2EQqQgPel4rl0YmcRfyNNOxKA+UcJLxmsijp9K39EN8obNLI r9vOeBE/FCpiOGtFtxJBZJUOXy1f/6bPiKi4qTn0= Date: Tue, 7 Apr 2026 14:59:02 -0700 From: Andrew Morton To: kernel test robot Cc: "Mike Rapoport (Microsoft)" , llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, David Hildenbrand , Linux Memory Management List , Alice Ryhl , Miguel Ojeda Subject: Re: [akpm-mm:mm-unstable 113/133] error[E0277]: `*const kernel::bindings::vm_uffd_ops` cannot be shared between threads safely Message-Id: <20260407145902.057044dc19e7313b21418ff4@linux-foundation.org> In-Reply-To: <202604071509.y5vLetYd-lkp@intel.com> References: <202604071509.y5vLetYd-lkp@intel.com> X-Mailer: Sylpheed 3.8.0beta1 (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-Queue-Id: 16C4240002 X-Stat-Signature: jm1qdpdizjpbhqmcd5fbmyf4a1icdscx X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1775599144-607537 X-HE-Meta: U2FsdGVkX1/3C0Ps9sr4QTAoFvUEKOpIjkJ5hVyq/vFybgwApXchJNcE3EPG/9MVZaWfIdj8rVXz4D0hvVcYr0es2k821Wqkojajrg4dFjW5A1a6x2rgLIChgP4APNQD8MxzQ9rQsVgcdRpfJwayxvknwNXHFRPXjNNLk+q+ousriG+ohQUdy5hBATh+nkwlv2qe4aKMRPGRGeasJJh/EmT05bDrNEjVJ6XaOMKvkDJiWrdXfUIBdjTorKDlNXojuHWz4KUyM8+HG8jexfP2wakiViutOeFhXDEHc0+oidvERroqV3JG7rSqVLPZryY3Zw2ZFGRmgXGIhnASXRivwXXSJH19+Wzc93QdCG5lIOawRdYvDIQ1iOtd+/R4yEdzthY7PGywxYQl1EKWogIu3wxGYko4PeBzqY91wnYsQFUU6+mi84Xbm4kR8x9Vn1IXoXUmr3zurcuckC4x+6ee1mVY1jlYP0NIwfGVJSWhc5nU45Xkgjma2gttnRdLhuXMkSrrWEkAtsy6eLaYFU8KHw6JGce2l0FcOokQB0pS9ESb0HyQYQO83CzIDH2HKOgmLcM1Rnc63sLFSS6vcCt3kgrz/Lt+SmwKW5UYqJFekCbxQ5uM50AO0IzbrpvkmxGhkHGjPHBjGLf9AmZsovGG7IgkiYziXFuXnDtujOetEwS8V2FO0GED9RAY8Y8zz5JmTt+a2wxIyjbO7mNXzvE/+ozoJdpZ77rAVyqouh3DxTxbacpCiA3P9Q4z4uGc1zUC/ZrRQw8vSlohjUjKVdJRjLgw5kSVKr+ObdRjVEd/AsbisRDHvjRW5S+ZqlgevCDo04kn9+L3G6+ryfAod9kTZclJ7wUkz4NlQ7m4/i7t76hz+KFZohjA4vDSy4ASp8bWjbx8/daTqKajmhPOcaD2rNxvn6t6DzxwenJmW4r2keBsatJ61NL0UzZQDe4WDj/+uelZCryqP65TAoDT80C HdY5WkSh NvUjse2aFPlPO39oqgLLgQmmHL6YUe8e1RduJ2BNIBiLvA9Od+/CnBf8R2tzlVzqhnw0PXIGRLsued1iK4nueVaSRyQnSxk5kxL2ZGissgX1NxbHpdDfvdHWP1i1vl6kbTzC3svs9Sj80+ktQr0aoB7TiX8NR+L3e+A0uLDS+uqBS/nMcB0JoeQGlMpzifUy6XHCoPXLRUwVe+ixK9fXr8YBA9KRb1u3BZmMHzO0Lig1+enJhwmeY6FPgwu2pZAEv45WnRMhWtAwlQlLOAah1efNryBUFr+/oBarz/RqmKNse6h4p1vNOChx/fCY2+p5W/o26v5lnH3dEJpU0qOTgHuB7jE6hCjOkGrV5dE98sieeAPEKefoJYctz9LziMFgWLp/47sc6R5r3gQ/HJy3e5ZoIIyk/jclc7OW5+dXlyCA0amQ= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, 07 Apr 2026 15:58:09 +0800 kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable > head: 3fa44141e0bbd5062f2ef0c5cdddd98275d3223e > commit: 694fc0bd3ca5420f4e1105d2dec02327cfc5d64b [113/133] userfaultfd: introduce vm_uffd_ops > config: x86_64-randconfig-074-20260407 (https://download.01.org/0day-ci/archive/20260407/202604071509.y5vLetYd-lkp@intel.com/config) > compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) > rustc: rustc 1.88.0 (6b00bc388 2025-06-23) > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260407/202604071509.y5vLetYd-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/202604071509.y5vLetYd-lkp@intel.com/ Various forms of "userfaultfd: introduce vm_uffd_ops" have been in mm.git since March 6. Thanks (much), but is it possible to get more timely notifications? > All errors (new ones prefixed by >>): > > >> error[E0277]: `*const kernel::bindings::vm_uffd_ops` cannot be shared between threads safely > --> drivers/android/binder/page_range.rs:146:23 > | > 146 | static BINDER_VM_OPS: bindings::vm_operations_struct = pin_init::zeroed(); > | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `*const kernel::bindings::vm_uffd_ops` cannot be shared between threads safely > | > = help: within `kernel::bindings::vm_operations_struct`, the trait `Sync` is not implemented for `*const kernel::bindings::vm_uffd_ops` > note: required because it appears within the type `kernel::bindings::vm_operations_struct` > --> rust/bindings/bindings_generated.rs:74703:12 > | > 74703 | pub struct vm_operations_struct { > | ^^^^^^^^^^^^^^^^^^^^ > = note: shared static variables must have a type that implements `Sync` We've seen this one before. Sorry, I'm (still) not set up for build-testing rusty things and I suspect I'm not the only one. Alice, Miguel: please can you help us here? Thanks.