mm/sparsemem: cleanup 'section number' data types

David points out that there is a mixture of 'int' and 'unsigned long'
usage for section number data types.  Update the memory hotplug path to
use 'unsigned long' consistently for section numbers.

[akpm@linux-foundation.org: fix printk format]
Link: http://lkml.kernel.org/r/156107543656.1329419.11505835211949439815.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: David Hildenbrand <david@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/memory_hotplug.c

@@ -288,8 +288,8 @@ static int check_pfn_span(unsigned long pfn, unsigned long nr_pages,
 int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages,
 		struct mhp_restrictions *restrictions)
 {
-	unsigned long i;
-	int start_sec, end_sec, err;
+	int err;
+	unsigned long nr, start_sec, end_sec;
 	struct vmem_altmap *altmap = restrictions->altmap;
 
 	if (altmap) {
@@ -310,7 +310,7 @@ int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages,
 
 	start_sec = pfn_to_section_nr(pfn);
 	end_sec = pfn_to_section_nr(pfn + nr_pages - 1);
-	for (i = start_sec; i <= end_sec; i++) {
+	for (nr = start_sec; nr <= end_sec; nr++) {
 		unsigned long pfns;
 
 		pfns = min(nr_pages, PAGES_PER_SECTION
@@ -541,7 +541,7 @@ void __remove_pages(struct zone *zone, unsigned long pfn,
 		    unsigned long nr_pages, struct vmem_altmap *altmap)
 {
 	unsigned long map_offset = 0;
-	int i, start_sec, end_sec;
+	unsigned long nr, start_sec, end_sec;
 
 	map_offset = vmem_altmap_offset(altmap);
 
@@ -552,7 +552,7 @@ void __remove_pages(struct zone *zone, unsigned long pfn,
 
 	start_sec = pfn_to_section_nr(pfn);
 	end_sec = pfn_to_section_nr(pfn + nr_pages - 1);
-	for (i = start_sec; i <= end_sec; i++) {
+	for (nr = start_sec; nr <= end_sec; nr++) {
 		unsigned long pfns;
 
 		cond_resched();

mm/sparse.c

@@ -229,21 +229,21 @@ void subsection_mask_set(unsigned long *map, unsigned long pfn,
 void __init subsection_map_init(unsigned long pfn, unsigned long nr_pages)
 {
 	int end_sec = pfn_to_section_nr(pfn + nr_pages - 1);
-	int i, start_sec = pfn_to_section_nr(pfn);
+	unsigned long nr, start_sec = pfn_to_section_nr(pfn);
 
 	if (!nr_pages)
 		return;
 
-	for (i = start_sec; i <= end_sec; i++) {
+	for (nr = start_sec; nr <= end_sec; nr++) {
 		struct mem_section *ms;
 		unsigned long pfns;
 
 		pfns = min(nr_pages, PAGES_PER_SECTION
 				- (pfn & ~PAGE_SECTION_MASK));
-		ms = __nr_to_section(i);
+		ms = __nr_to_section(nr);
 		subsection_mask_set(ms->usage->subsection_map, pfn, pfns);
 
-		pr_debug("%s: sec: %d pfns: %ld set(%d, %d)\n", __func__, i,
+		pr_debug("%s: sec: %lu pfns: %lu set(%d, %d)\n", __func__, nr,
 				pfns, subsection_map_index(pfn),
 				subsection_map_index(pfn + pfns - 1));