mm/sparse: use memblock apis for early memory allocations

Switch to memblock interfaces for early memory allocator instead of
bootmem allocator.  No functional change in beahvior than what it is in
current code from bootmem users points of view.

Archs already converted to NO_BOOTMEM now directly use memblock
interfaces instead of bootmem wrappers build on top of memblock.  And
the archs which still uses bootmem, these new apis just fallback to
exiting bootmem APIs.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Tejun Heo <tj@kernel.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/sparse-vmemmap.c

@@ -40,7 +40,8 @@ static void * __init_refok __earlyonly_bootmem_alloc(int node,
 				unsigned long align,
 				unsigned long goal)
 {
-	return __alloc_bootmem_node_high(NODE_DATA(node), size, align, goal);
+	return memblock_virt_alloc_try_nid(size, align, goal,
+					    BOOTMEM_ALLOC_ACCESSIBLE, node);
 }
 
 static void *vmemmap_buf;
@@ -226,7 +227,8 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
 
 	if (vmemmap_buf_start) {
 		/* need to free left buf */
-		free_bootmem(__pa(vmemmap_buf), vmemmap_buf_end - vmemmap_buf);
+		memblock_free_early(__pa(vmemmap_buf),
+				    vmemmap_buf_end - vmemmap_buf);
 		vmemmap_buf = NULL;
 		vmemmap_buf_end = NULL;
 	}

mm/sparse.c

@@ -69,7 +69,7 @@ static struct mem_section noinline __init_refok *sparse_index_alloc(int nid)
 		else
 			section = kzalloc(array_size, GFP_KERNEL);
 	} else {
-		section = alloc_bootmem_node(NODE_DATA(nid), array_size);
+		section = memblock_virt_alloc_node(array_size, nid);
 	}
 
 	return section;
@@ -279,8 +279,9 @@ sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
 	limit = goal + (1UL << PA_SECTION_SHIFT);
 	nid = early_pfn_to_nid(goal >> PAGE_SHIFT);
 again:
-	p = ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
-					  SMP_CACHE_BYTES, goal, limit);
+	p = memblock_virt_alloc_try_nid_nopanic(size,
+						SMP_CACHE_BYTES, goal, limit,
+						nid);
 	if (!p && limit) {
 		limit = 0;
 		goto again;
@@ -331,7 +332,7 @@ static unsigned long * __init
 sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
 					 unsigned long size)
 {
-	return alloc_bootmem_node_nopanic(pgdat, size);
+	return memblock_virt_alloc_node_nopanic(size, pgdat->node_id);
 }
 
 static void __init check_usemap_section_nr(int nid, unsigned long *usemap)
@@ -376,8 +377,9 @@ struct page __init *sparse_mem_map_populate(unsigned long pnum, int nid)
 		return map;
 
 	size = PAGE_ALIGN(sizeof(struct page) * PAGES_PER_SECTION);
-	map = __alloc_bootmem_node_high(NODE_DATA(nid), size,
-					 PAGE_SIZE, __pa(MAX_DMA_ADDRESS));
+	map = memblock_virt_alloc_try_nid(size,
+					  PAGE_SIZE, __pa(MAX_DMA_ADDRESS),
+					  BOOTMEM_ALLOC_ACCESSIBLE, nid);
 	return map;
 }
 void __init sparse_mem_maps_populate_node(struct page **map_map,
@@ -401,8 +403,9 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
 	}
 
 	size = PAGE_ALIGN(size);
-	map = __alloc_bootmem_node_high(NODE_DATA(nodeid), size * map_count,
-					 PAGE_SIZE, __pa(MAX_DMA_ADDRESS));
+	map = memblock_virt_alloc_try_nid(size * map_count,
+					  PAGE_SIZE, __pa(MAX_DMA_ADDRESS),
+					  BOOTMEM_ALLOC_ACCESSIBLE, nodeid);
 	if (map) {
 		for (pnum = pnum_begin; pnum < pnum_end; pnum++) {
 			if (!present_section_nr(pnum))
@@ -545,15 +548,15 @@ void __init sparse_init(void)
 	 * sparse_early_mem_map_alloc, so allocate usemap_map at first.
 	 */
 	size = sizeof(unsigned long *) * NR_MEM_SECTIONS;
-	usemap_map = alloc_bootmem(size);
+	usemap_map = memblock_virt_alloc(size, 0);
 	if (!usemap_map)
 		panic("can not allocate usemap_map\n");
 	alloc_usemap_and_memmap(sparse_early_usemaps_alloc_node,
 							(void *)usemap_map);
 
 #ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
 	size2 = sizeof(struct page *) * NR_MEM_SECTIONS;
-	map_map = alloc_bootmem(size2);
+	map_map = memblock_virt_alloc(size2, 0);
 	if (!map_map)
 		panic("can not allocate map_map\n");
 	alloc_usemap_and_memmap(sparse_early_mem_maps_alloc_node,
@@ -583,9 +586,9 @@ void __init sparse_init(void)
 	vmemmap_populate_print_last();
 
 #ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
-	free_bootmem(__pa(map_map), size2);
+	memblock_free_early(__pa(map_map), size2);
 #endif
-	free_bootmem(__pa(usemap_map), size);
+	memblock_free_early(__pa(usemap_map), size);
 }
 
 #ifdef CONFIG_MEMORY_HOTPLUG