linux-kernel - [RFC PATCH V2 2/10] mm: expose is_mem_section

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Date:   Tue,  7 Jan 2020 21:09:42 +0800
From:   lantianyu1986@...il.com
To:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        sashal@...nel.org, akpm@...ux-foundation.org,
        michael.h.kelley@...rosoft.com, david@...hat.com
Cc:     Tianyu Lan <Tianyu.Lan@...rosoft.com>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, vkuznets@...hat.com, eric.devolder@...cle.com,
        vbabka@...e.cz, osalvador@...e.de, pavel.tatashin@...rosoft.com,
        rppt@...ux.ibm.com, mhocko@...e.com
Subject: [RFC PATCH V2 2/10] mm: expose is_mem_section_removable() symbol

From: Tianyu Lan <Tianyu.Lan@...rosoft.com>

Hyper-V balloon driver will use is_mem_section_removable() to
check whether memory block is removable or not when receive
memory hot remove msg. Expose it.

Signed-off-by: Tianyu Lan <Tianyu.Lan@...rosoft.com>
---
 mm/memory_hotplug.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index d04369e6d3cc..a4ebfc5c48b3 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1179,6 +1179,7 @@ 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_GPL(is_mem_section_removable);
 
 /*
  * Confirm all pages in a range [start, end) belong to the same zone.
-- 
2.14.5