linux-kernel - [PATCH RFCv2 3/4] s390: numa: implement memory_add_physaddr_to

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 23 May 2018 20:24:03 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, David Hildenbrand <david@...hat.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-s390@...r.kernel.org
Subject: [PATCH RFCv2 3/4] s390: numa: implement memory_add_physaddr_to_nid()

The common interface to be used with add_memory().

Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Michal Hocko <mhocko@...e.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-s390@...r.kernel.org
Signed-off-by: David Hildenbrand <david@...hat.com>
---
 arch/s390/numa/numa.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/s390/numa/numa.c b/arch/s390/numa/numa.c
index 06a80434cfe6..8902652ab3e5 100644
--- a/arch/s390/numa/numa.c
+++ b/arch/s390/numa/numa.c
@@ -44,6 +44,18 @@ int numa_pfn_to_nid(unsigned long pfn)
 	return mode->__pfn_to_nid ? mode->__pfn_to_nid(pfn) : 0;
 }
 
+#ifdef CONFIG_MEMORY_HOTPLUG
+int memory_add_physaddr_to_nid(u64 addr)
+{
+	int nid = numa_pfn_to_nid(PFN_DOWN(addr));
+
+	if (nid < 0)
+		return 0;
+	return nid;
+}
+EXPORT_SYMBOL(memory_add_physaddr_to_nid);
+#endif
+
 void numa_update_cpu_topology(void)
 {
 	if (mode->update_cpu_topology)
-- 
2.17.0