From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with ESMTP id A940C6B00D7 for ; Tue, 9 Mar 2010 15:38:26 -0500 (EST) Date: Tue, 9 Mar 2010 12:37:48 -0800 From: Andrew Morton Subject: Re: [PATCH 2/2] memory hotplug/s390: set phys_device Message-Id: <20100309123748.3015e10a.akpm@linux-foundation.org> In-Reply-To: <20100309172052.GC2360@osiris.boeblingen.de.ibm.com> References: <20100309172052.GC2360@osiris.boeblingen.de.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Heiko Carstens Cc: Dave Hansen , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Gerald Schaefer , KAMEZAWA Hiroyuki , Martin Schwidefsky List-ID: On Tue, 9 Mar 2010 18:20:52 +0100 Heiko Carstens wrote: > From: Heiko Carstens > > 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 > Cc: Gerald Schaefer > Cc: KAMEZAWA Hiroyuki > Signed-off-by: Heiko Carstens > --- > 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? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org