linux-kernel - [PATCH RFC 8/8] mm: export more functions used to online/offline memory

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Date:   Fri, 13 Apr 2018 15:33:42 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-mm@...ck.org
Cc:     David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Pavel Tatashin <pasha.tatashin@...cle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH RFC 8/8] mm: export more functions used to online/offline memory

Kernel modules that want to control how/when memory is onlined/offlined
need these functions.

Signed-off-by: David Hildenbrand <david@...hat.com>
---
 mm/memory_hotplug.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index ac14ea772792..3c374d308cf4 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -979,6 +979,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
 	memory_notify(MEM_CANCEL_ONLINE, &arg);
 	return ret;
 }
+EXPORT_SYMBOL(online_pages);
 #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
 
 static void reset_node_present_pages(pg_data_t *pgdat)
@@ -1296,6 +1297,7 @@ bool is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages)
 	/* All pageblocks in the memory block are likely to be hot-removable */
 	return true;
 }
+EXPORT_SYMBOL(is_mem_section_removable);
 
 /*
  * Confirm all pages in a range [start, end) belong to the same zone.
@@ -1752,6 +1754,7 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages)
 {
 	return __offline_pages(start_pfn, start_pfn + nr_pages);
 }
+EXPORT_SYMBOL(offline_pages);
 #endif /* CONFIG_MEMORY_HOTREMOVE */
 
 /**
@@ -1802,6 +1805,7 @@ int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn,
 
 	return 0;
 }
+EXPORT_SYMBOL(walk_memory_range);
 
 #ifdef CONFIG_MEMORY_HOTREMOVE
 static int check_memblock_offlined_cb(struct memory_block *mem, void *arg)
-- 
2.14.3