tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git pg_table/v0.0 head: fd150c5a9ef6e3e43818825c69a46de2b427dedf commit: 582d02322eb4f4d2d3903c0967216bc6b671164f [8/18] mm: enable pud allocations for pg_table config: sparc64-randconfig-a001-20200202 (attached as .config) compiler: sparc64-linux-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 582d02322eb4f4d2d3903c0967216bc6b671164f # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=sparc64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): mm/memory.c: In function '__pud_alloc': _pgd_populate(pgt, p4d, new); ^~~~~~~~~~~~~ __pgd_populate cc1: some warnings being treated as errors vim +4074 mm/memory.c 4050 4051 #ifndef __PAGETABLE_PUD_FOLDED 4052 /* 4053 * Allocate page upper directory. 4054 * We've already handled the fast-path in-line. 4055 */ 4056 int __pud_alloc(struct pg_table *pgt, p4d_t *p4d, unsigned long address) 4057 { 4058 pud_t *new = pud_alloc_one(pgt, address); 4059 if (!new) 4060 return -ENOMEM; 4061 4062 smp_wmb(); /* See comment in __pte_alloc */ 4063 4064 spin_lock(&pgt->page_table_lock); 4065 #ifndef __ARCH_HAS_5LEVEL_HACK 4066 if (!p4d_present(*p4d)) { 4067 mm_inc_nr_puds(pgt); 4068 _p4d_populate(pgt, p4d, new); 4069 } else /* Another has populated it */ 4070 pud_free(new); 4071 #else 4072 if (!pgd_present(*p4d)) { 4073 mm_inc_nr_puds(pgt); 4075 } else /* Another has populated it */ 4076 pud_free(new); 4077 #endif /* __ARCH_HAS_5LEVEL_HACK */ 4078 spin_unlock(&pgt->page_table_lock); 4079 return 0; 4080 } 4081 #endif /* __PAGETABLE_PUD_FOLDED */ 4082 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation