NUM_EARLY_PMDS 221 arch/riscv/mm/init.c pmd_t early_pmd[PTRS_PER_PMD * NUM_EARLY_PMDS] __initdata __aligned(PAGE_SIZE); NUM_EARLY_PMDS 241 arch/riscv/mm/init.c BUG_ON(pmd_num >= NUM_EARLY_PMDS);