On Tue, 9 Mar 2010 18:20:52 +0100
Heiko Carstens <heiko.carstens@xxxxxxxxxx> wrote:
> From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
>
> Implement arch specific arch_get_memory_phys_device function and initialize
> phys_device for each memory section. That way we finally can tell which
> piece of memory belongs to which physical device.
>
> Cc: Dave Hansen <haveblue@xxxxxxxxxx>
> Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
> Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
> ---
> drivers/s390/char/sclp_cmd.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> --- a/drivers/s390/char/sclp_cmd.c
> +++ b/drivers/s390/char/sclp_cmd.c
> @@ -704,6 +704,13 @@ int sclp_chp_deconfigure(struct chp_id c
> return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8);
> }
>
> +int arch_get_memory_phys_device(unsigned long start_pfn)
> +{
> + if (!rzm)
> + return 0;
> + return PFN_PHYS(start_pfn) / rzm;
> +}
> +
> struct chp_info_sccb {
> struct sccb_header header;
> u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
What is the utility of this patch? It makes s390's
/sys/devices/system/memory/memoryX/phys_device display the correct
thing?
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