mm, sparse: pass nid instead of pgdat to sparse_add_one_section()

Since the information needed in sparse_add_one_section() is node id to
allocate proper memory, it is not necessary to pass its pgdat.

This patch changes the prototype of sparse_add_one_section() to pass node
id directly.  This is intended to reduce misleading that
sparse_add_one_section() would touch pgdat.

Link: http://lkml.kernel.org/r/20181204085657.20472-2-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 9e4d9b9..8ed6e09 100644 (file)
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -333,8 +333,8 @@ extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
                unsigned long nr_pages, struct vmem_altmap *altmap);
 extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
 extern bool is_memblock_offlined(struct memory_block *mem);
-extern int sparse_add_one_section(struct pglist_data *pgdat,
-               unsigned long start_pfn, struct vmem_altmap *altmap);
+extern int sparse_add_one_section(int nid, unsigned long start_pfn,
+                                 struct vmem_altmap *altmap);
 extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms,
                unsigned long map_offset, struct vmem_altmap *altmap);
 extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map,

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 0718cf7..5f15f9c 100644 (file)
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -253,7 +253,7 @@ static int __meminit __add_section(int nid, unsigned long phys_start_pfn,
        if (pfn_valid(phys_start_pfn))
                return -EEXIST;
 
-       ret = sparse_add_one_section(NODE_DATA(nid), phys_start_pfn, altmap);
+       ret = sparse_add_one_section(nid, phys_start_pfn, altmap);
        if (ret < 0)
                return ret;
 

diff --git a/mm/sparse.c b/mm/sparse.c
index 7323a03..7ea5dc6 100644 (file)
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -678,8 +678,8 @@ static void free_map_bootmem(struct page *memmap)
  * set.  If this is <=0, then that means that the passed-in
  * map was not consumed and must be freed.
  */
-int __meminit sparse_add_one_section(struct pglist_data *pgdat,
-               unsigned long start_pfn, struct vmem_altmap *altmap)
+int __meminit sparse_add_one_section(int nid, unsigned long start_pfn,
+                                    struct vmem_altmap *altmap)
 {
        unsigned long section_nr = pfn_to_section_nr(start_pfn);
        struct mem_section *ms;
@@ -691,11 +691,11 @@ int __meminit sparse_add_one_section(struct pglist_data *pgdat,
         * no locking for this, because it does its own
         * plus, it does a kmalloc
         */
-       ret = sparse_index_init(section_nr, pgdat->node_id);
+       ret = sparse_index_init(section_nr, nid);
        if (ret < 0 && ret != -EEXIST)
                return ret;
        ret = 0;
-       memmap = kmalloc_section_memmap(section_nr, pgdat->node_id, altmap);
+       memmap = kmalloc_section_memmap(section_nr, nid, altmap);
        if (!memmap)
                return -ENOMEM;
        usemap = __kmalloc_section_usemap();