Re: [PATCH] zcrypt: handle AP Info notification from CHSC SEI command

Sebastian Ott
2019-01-30T18:32:53Z

On Wed, 30 Jan 2019, Tony Krowiak wrote:
> +#if IS_ENABLED(CONFIG_ZCRYPT)
> +void ap_bus_cfg_chg(void);
> +#else
> +#error "no CONFIG_ZCRYPT"
^
I don't think that's the right thing to do here.

> +++ b/drivers/s390/cio/chsc.h
> @@ -9,6 +9,7 @@
> #include <asm/chsc.h>
> #include <asm/schid.h>
> #include <asm/qdio.h>
> +#include <asm/ap.h>

This should be moved to chsc.c

> +++ b/drivers/s390/crypto/ap_bus.c
> @@ -35,6 +35,7 @@
> #include <linux/mod_devicetable.h>
> #include <linux/debugfs.h>
> #include <linux/ctype.h>
> +#include <asm/crw.h>

This is not needed here.

> /*
> +* A config change has happened, Force an ap bus rescan.
> +*/
> +void ap_bus_cfg_chg(void)
> +{
> + AP_DBF(DBF_INFO, "%s config change, forcing bus rescan\n", __func__);
> +
> + ap_bus_force_rescan();
> +}
> +EXPORT_SYMBOL(ap_bus_cfg_chg);

There is no need for the export symbol - you don't call that function
from module code.
As an unrelated question, just to be sure: ap_bus.c is compiled as
built-in even with ZCRYPT=m, right?

Reviewed-by: Sebastian Ott <sebott@linux.ibm.com>

Regards,
Sebastian