[PATCH 12/12] mm/memory_hotplug: drop CONFIG_HAVE_ARCH_PFN_VALID handling from pfn_to_online_page()

["David Hildenbrand (Arm)" <david@kernel.org>]

Drop CONFIG_HAVE_ARCH_PFN_VALID handling, as CONFIG_HAVE_ARCH_PFN_VALID
is never used with CONFIG_MEMORY_HOTPLUG, as the latter depends on
CONFIG_SPARSEMEM_VMEMMAP. Make sure it stays that way.

Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
---
 mm/memory_hotplug.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index b428da66d279c..58ce35cb48f57 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -344,6 +344,8 @@ struct page *pfn_to_online_page(unsigned long pfn)
 	struct dev_pagemap *pgmap;
 	struct mem_section *ms;
 
+	BUILD_BUG_ON(IS_ENABLED(CONFIG_HAVE_ARCH_PFN_VALID));
+
 	if (nr >= NR_MEM_SECTIONS)
 		return NULL;
 
@@ -351,13 +353,6 @@ struct page *pfn_to_online_page(unsigned long pfn)
 	if (!online_section(ms))
 		return NULL;
 
-	/*
-	 * Save some code text when online_section() +
-	 * pfn_section_valid() are sufficient.
-	 */
-	if (IS_ENABLED(CONFIG_HAVE_ARCH_PFN_VALID) && !pfn_valid(pfn))
-		return NULL;
-
 	if (!pfn_section_valid(ms, pfn))
 		return NULL;
 

-- 
2.43.0