APDB 59 arch/arm64/include/asm/pointer_auth.h __ptrauth_key_install(APDB, keys->apdb); APDB 1496 arch/arm64/kvm/sys_regs.c PTRAUTH_KEY(APDB), APDB 405 virt/kvm/arm/arm.c __ptrauth_save_key(ctxt->sys_regs, APDB);