Hi Anshuman, Thank you for the patch! Yet something to improve: [auto build test ERROR on hnaz-mm/master] url: https://github.com/0day-ci/linux/commits/Anshuman-Khandual/mm-mmap-Drop-p... base: https://github.com/hnaz/linux-mm master config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220214/202202141426.Q2fKI6yq-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/f96d6fa064e3f24686f111d1b4c06b865... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Anshuman-Khandual/mm-mmap-Drop-protection_map-and-platform-s-__SXXX-__PXXX-requirements/20220214-103534 git checkout f96d6fa064e3f24686f111d1b4c06b865ca103ec # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/x86/um/mem_32.c: In function 'gate_vma_init': 20 | gate_vma.vm_page_prot = __P101; | ^~~~~~ arch/x86/um/mem_32.c:20:26: note: each undeclared identifier is reported only once for each function it appears in vim +/__P101 +20 arch/x86/um/mem_32.c 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 10 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 11 static int __init gate_vma_init(void) 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 12 { 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 13 if (!FIXADDR_USER_START) 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 14 return 0; 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 15 2c4541e24c55e2 arch/x86/um/mem_32.c Kirill A. Shutemov 2018-07-26 16 vma_init(&gate_vma, NULL); 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 17 gate_vma.vm_start = FIXADDR_USER_START; 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 18 gate_vma.vm_end = FIXADDR_USER_END; 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 19 gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC; 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 @20 gate_vma.vm_page_prot = __P101; 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 21 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 22 return 0; 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 23 } 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 24 __initcall(gate_vma_init); 548f0a4e02f6fa arch/um/sys-i386/mem.c Richard Weinberger 2011-07-25 25 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org