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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 21 Feb 2020 03:28:08 -0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 01L3S7o531523282 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Feb 2020 03:28:07 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 871E0A4040; Fri, 21 Feb 2020 03:28:07 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 330E5A404D; Fri, 21 Feb 2020 03:28:07 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 21 Feb 2020 03:28:07 +0000 (GMT) Received: from adsilva.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 93FA8A0278; Fri, 21 Feb 2020 14:28:02 +1100 (AEDT) From: "Alastair D'Silva" To: alastair@d-silva.org Cc: "Aneesh Kumar K . V" , "Oliver O'Halloran" , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Frederic Barrat , Andrew Donnellan , Arnd Bergmann , Greg Kroah-Hartman , Dan Williams , Vishal Verma , Dave Jiang , Ira Weiny , Andrew Morton , Mauro Carvalho Chehab , "David S. Miller" , Rob Herring , Anton Blanchard , Krzysztof Kozlowski , Mahesh Salgaonkar , Madhavan Srinivasan , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Anju T Sudhakar , Hari Bathini , Thomas Gleixner , Greg Kurz , Nicholas Piggin , Masahiro Yamada , Alexey Kardashevskiy , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-nvdimm@lists.01.org, linux-mm@kvack.org Subject: [PATCH v3 02/27] mm/memory_hotplug: Allow check_hotplug_memory_addressable to be called from drivers Date: Fri, 21 Feb 2020 14:26:55 +1100 X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200221032720.33893-1-alastair@au1.ibm.com> References: <20200221032720.33893-1-alastair@au1.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 20022103-0008-0000-0000-00000354F594 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20022103-0009-0000-0000-00004A760737 Message-Id: <20200221032720.33893-3-alastair@au1.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-20_19:2020-02-19,2020-02-20 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 bulkscore=0 spamscore=0 suspectscore=3 malwarescore=0 priorityscore=1501 impostorscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002210020 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Alastair D'Silva When setting up OpenCAPI connected persistent memory, the range check may not be performed until quite late (or perhaps not at all, if the user doe= s not establish a DAX device). This patch makes the range check callable so we can perform the check whi= le probing the OpenCAPI SCM device. Signed-off-by: Alastair D'Silva --- include/linux/memory_hotplug.h | 5 +++++ mm/memory_hotplug.c | 4 ++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplu= g.h index f4d59155f3d4..34a69aecc45e 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -337,6 +337,11 @@ static inline void __remove_memory(int nid, u64 star= t, u64 size) {} extern void set_zone_contiguous(struct zone *zone); extern void clear_zone_contiguous(struct zone *zone); =20 +#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE +int check_hotplug_memory_addressable(unsigned long pfn, + unsigned long nr_pages); +#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ + extern void __ref free_area_init_core_hotplug(int nid); extern int __add_memory(int nid, u64 start, u64 size); extern int add_memory(int nid, u64 start, u64 size); diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 0a54ffac8c68..14945f033594 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -276,8 +276,8 @@ static int check_pfn_span(unsigned long pfn, unsigned= long nr_pages, return 0; } =20 -static int check_hotplug_memory_addressable(unsigned long pfn, - unsigned long nr_pages) +int check_hotplug_memory_addressable(unsigned long pfn, + unsigned long nr_pages) { const u64 max_addr =3D PFN_PHYS(pfn + nr_pages) - 1; =20 --=20 2.24.1