mm/sparse: remove unused parameters in sparse_remove_section()

These parameters ms and map_offset are not used in
sparse_remove_section(), so remove them.

The __remove_section() is only called by __remove_pages(), remove it.  And
put the WARN_ON_ONCE() in sparse_remove_section().

Link: https://lkml.kernel.org/r/20230607023952.2247489-1-yajun.deng@linux.devSigned-off-by: Yajun Deng <yajun.deng@linux.dev>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

include/linux/memory_hotplug.h

@@ -344,9 +344,8 @@ extern void remove_pfn_range_from_zone(struct zone *zone,
 extern int sparse_add_section(int nid, unsigned long pfn,
 		unsigned long nr_pages, struct vmem_altmap *altmap,
 		struct dev_pagemap *pgmap);
-extern void sparse_remove_section(struct mem_section *ms,
-		unsigned long pfn, unsigned long nr_pages,
-		unsigned long map_offset, struct vmem_altmap *altmap);
+extern void sparse_remove_section(unsigned long pfn, unsigned long nr_pages,
+				  struct vmem_altmap *altmap);
 extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map,
 					  unsigned long pnum);
 extern struct zone *zone_for_pfn_range(int online_type, int nid,

mm/memory_hotplug.c

@@ -492,18 +492,6 @@ void __ref remove_pfn_range_from_zone(struct zone *zone,
 	set_zone_contiguous(zone);
 }
 
-static void __remove_section(unsigned long pfn, unsigned long nr_pages,
-			     unsigned long map_offset,
-			     struct vmem_altmap *altmap)
-{
-	struct mem_section *ms = __pfn_to_section(pfn);
-
-	if (WARN_ON_ONCE(!valid_section(ms)))
-		return;
-
-	sparse_remove_section(ms, pfn, nr_pages, map_offset, altmap);
-}
-
 /**
  * __remove_pages() - remove sections of pages
  * @pfn: starting pageframe (must be aligned to start of a section)
@@ -520,9 +508,6 @@ void __remove_pages(unsigned long pfn, unsigned long nr_pages,
 {
 	const unsigned long end_pfn = pfn + nr_pages;
 	unsigned long cur_nr_pages;
-	unsigned long map_offset = 0;
-
-	map_offset = vmem_altmap_offset(altmap);
 
 	if (check_pfn_span(pfn, nr_pages)) {
 		WARN(1, "Misaligned %s start: %#lx end: %#lx\n", __func__, pfn, pfn + nr_pages - 1);
@@ -534,8 +519,7 @@ void __remove_pages(unsigned long pfn, unsigned long nr_pages,
 		/* Select all remaining pages up to the next section boundary */
 		cur_nr_pages = min(end_pfn - pfn,
 				   SECTION_ALIGN_UP(pfn + 1) - pfn);
-		__remove_section(pfn, cur_nr_pages, map_offset, altmap);
-		map_offset = 0;
+		sparse_remove_section(pfn, cur_nr_pages, altmap);
 	}
 }
 

mm/sparse.c

@@ -922,10 +922,14 @@ int __meminit sparse_add_section(int nid, unsigned long start_pfn,
 	return 0;
 }
 
-void sparse_remove_section(struct mem_section *ms, unsigned long pfn,
-		unsigned long nr_pages, unsigned long map_offset,
+void sparse_remove_section(unsigned long pfn, unsigned long nr_pages,
 			   struct vmem_altmap *altmap)
 {
+	struct mem_section *ms = __pfn_to_section(pfn);
+
+	if (WARN_ON_ONCE(!valid_section(ms)))
+		return;
+
 	section_deactivate(pfn, nr_pages, altmap);
 }
 #endif /* CONFIG_MEMORY_HOTPLUG */