[PATCH v1] drivers/base/node.c: get rid of get_nid_for_pfn()

[David Hildenbrand <david@redhat.com>]

Since commit d84f2f5a7552 ("drivers/base/node.c: simplify
unregister_memory_block_under_nodes()") we only have a single user of
get_nid_for_pfn(). Let's just inline that code and get rid of
get_nid_for_pfn().

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 drivers/base/node.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 98a31bafc8a2..735073fd2926 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -744,17 +744,6 @@ int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
 }
 
 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
-static int __ref get_nid_for_pfn(unsigned long pfn)
-{
-	if (!pfn_valid_within(pfn))
-		return -1;
-#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
-	if (system_state < SYSTEM_RUNNING)
-		return early_pfn_to_nid(pfn);
-#endif
-	return pfn_to_nid(pfn);
-}
-
 /* register memory section under specified node if it spans that node */
 static int register_mem_sect_under_node(struct memory_block *mem_blk,
 					 void *arg)
@@ -766,8 +755,6 @@ static int register_mem_sect_under_node(struct memory_block *mem_blk,
 	unsigned long pfn;
 
 	for (pfn = start_pfn; pfn <= end_pfn; pfn++) {
-		int page_nid;
-
 		/*
 		 * memory block could have several absent sections from start.
 		 * skip pfn range from absent section
@@ -784,11 +771,15 @@ static int register_mem_sect_under_node(struct memory_block *mem_blk,
 		 * block belong to the same node.
 		 */
 		if (system_state == SYSTEM_BOOTING) {
-			page_nid = get_nid_for_pfn(pfn);
-			if (page_nid < 0)
+			if (!pfn_valid_within(pfn))
 				continue;
-			if (page_nid != nid)
+#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
+			if (early_pfn_to_nid(pfn) != nid)
 				continue;
+#else
+			if (pfn_to_nid(pfn) != nid)
+				continue;
+#endif
 		}
 
 		/*
-- 
2.21.0