[PATCH v2 kernel 3/7] mm: add a function to get the max pfn

From: Liang Li <liang.z.li@intel.com>
To: mst@redhat.com
Cc: linux-kernel@vger.kernel.org,
	virtualization@lists.linux-foundation.org, kvm@vger.kernel.org,
	qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org,
	dgilbert@redhat.com, quintela@redhat.com,
	Liang Li <liang.z.li@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Mel Gorman <mgorman@techsingularity.net>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Cornelia Huck <cornelia.huck@de.ibm.com>,
	Amit Shah <amit.shah@redhat.com>
Subject: [PATCH v2 kernel 3/7] mm: add a function to get the max pfn
Date: Wed, 29 Jun 2016 18:32:16 +0800	[thread overview]
Message-ID: <1467196340-22079-4-git-send-email-liang.z.li@intel.com> (raw)
In-Reply-To: <1467196340-22079-1-git-send-email-liang.z.li@intel.com>

Expose the function to get the max pfn, so it can be used in the
virtio-balloon device driver.

Signed-off-by: Liang Li <liang.z.li@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Amit Shah <amit.shah@redhat.com>
---
 mm/page_alloc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6903b69..2083b40 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4515,6 +4515,12 @@ void show_free_areas(unsigned int filter)
 	show_swap_cache_info();
 }
 
+unsigned long get_max_pfn(void)
+{
+	return max_pfn;
+}
+EXPORT_SYMBOL(get_max_pfn);
+
 static void zoneref_set_zone(struct zone *zone, struct zoneref *zoneref)
 {
 	zoneref->zone = zone;
-- 
1.8.3.1
