+ mm-memory_hotplug-cleanup-__add_pages.patch added to -mm tree

+ mm-memory_hotplug-cleanup-__add_pages.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/memory_hotplug.c: cleanup __add_pages()
has been added to the -mm tree.  Its filename is
     mm-memory_hotplug-cleanup-__add_pages.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-memory_hotplug-cleanup-__add_pages.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-memory_hotplug-cleanup-__add_pages.patch

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------------------------------------------------------
From: David Hildenbrand <david@redhat.com>
Subject: mm/memory_hotplug.c: cleanup __add_pages()

Let's drop the basically unused section stuff and simplify.  The logic now
matches the logic in __remove_pages().

Link: http://lkml.kernel.org/r/20200228095819.10750-3-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory_hotplug.c |   18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

--- a/mm/memory_hotplug.c~mm-memory_hotplug-cleanup-__add_pages
+++ a/mm/memory_hotplug.c
@@ -307,8 +307,9 @@ static int check_hotplug_memory_addressa
 int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages,
 		struct mhp_restrictions *restrictions)
 {
+	const unsigned long end_pfn = pfn + nr_pages;
+	unsigned long cur_nr_pages;
 	int err;
-	unsigned long nr, start_sec, end_sec;
 	struct vmem_altmap *altmap = restrictions->altmap;
 
 	err = check_hotplug_memory_addressable(pfn, nr_pages);
@@ -331,18 +332,13 @@ int __ref __add_pages(int nid, unsigned
 	if (err)
 		return err;
 
-	start_sec = pfn_to_section_nr(pfn);
-	end_sec = pfn_to_section_nr(pfn + nr_pages - 1);
-	for (nr = start_sec; nr <= end_sec; nr++) {
-		unsigned long pfns;