Hi Peter, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Peter-Xu/mm-handle_mm_fault_one/20230512-081554 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/ZF2E6i4pqJr7m436%40x1n patch subject: [PATCH 1/3] mm: handle_mm_fault_one() config: x86_64-randconfig-a014 (https://download.01.org/0day-ci/archive/20230512/202305121114.JAbwVHjS-lkp@xxxxxxxxx/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/0a03a4870c8a62e3ba52a0f9b50b307f509acb2b git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Peter-Xu/mm-handle_mm_fault_one/20230512-081554 git checkout 0a03a4870c8a62e3ba52a0f9b50b307f509acb2b # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 prepare If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202305121114.JAbwVHjS-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from arch/x86/kernel/asm-offsets.c:14: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:20: >> include/linux/mm.h:2371:6: error: use of undeclared identifier 'fault' if (fault & (VM_FAULT_RETRY | VM_FAULT_COMPLETED)) ^ >> include/linux/mm.h:2396:20: error: use of undeclared identifier 'mm' mmap_read_unlock(mm); ^ 2 errors generated. make[2]: *** [scripts/Makefile.build:114: arch/x86/kernel/asm-offsets.s] Error 1 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:1287: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:226: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +/fault +2371 include/linux/mm.h 2362 2363 static inline bool 2364 mm_should_release_mmap(unsigned long flags, vm_fault_t retval) 2365 { 2366 /* The caller explicitly requested to keep the mmap read lock */ 2367 if (flags & FAULT_FLAG_RETRY_NOWAIT) 2368 return false; 2369 2370 /* If the mmap read lock is already released, we're all good */ > 2371 if (fault & (VM_FAULT_RETRY | VM_FAULT_COMPLETED)) 2372 return false; 2373 2374 /* Otherwise always release it */ 2375 return true; 2376 } 2377 2378 /* 2379 * This is mostly handle_mm_fault(), but it also take care of releasing 2380 * mmap or vma read lock as long as possible (e.g. when !RETRY_NOWAIT). 2381 * 2382 * Normally it's the case when we got a hardware page fault, where we want 2383 * to release the lock right after the page fault. And it's not for case 2384 * like GUP where it can fault a range of pages continuously with mmap lock 2385 * being held during the process. 2386 */ 2387 static inline vm_fault_t 2388 handle_mm_fault_one(struct vm_area_struct *vma, unsigned long address, 2389 unsigned int flags, struct pt_regs *regs) 2390 { 2391 vm_fault_t retval = handle_mm_fault(vma, address, flags, regs); 2392 2393 if (flags & FAULT_FLAG_VMA_LOCK) 2394 vma_end_read(vma); 2395 else if (mm_should_release_mmap(flags, retval)) > 2396 mmap_read_unlock(mm); 2397 2398 return retval; 2399 } 2400 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
