vdso_len 59 arch/riscv/kernel/vdso.c unsigned long vdso_base, vdso_len; vdso_len 62 arch/riscv/kernel/vdso.c vdso_len = (vdso_pages + 1) << PAGE_SHIFT; vdso_len 65 arch/riscv/kernel/vdso.c vdso_base = get_unmapped_area(NULL, 0, vdso_len, 0, 0); vdso_len 78 arch/riscv/kernel/vdso.c ret = install_special_mapping(mm, vdso_base, vdso_len,