[PATCH v3 15/23] mm/sparse: Use memblock apis for early memory allocations

[Santosh Shilimkar]

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.

Cc: Yinghai Lu <yinghai at kernel.org>
Cc: Tejun Heo <tj at kernel.org>
Cc: Andrew Morton <akpm at linux-foundation.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar at ti.com>
---
 mm/sparse-vmemmap.c |    6 ++++--
 mm/sparse.c         |   27 +++++++++++++++------------
 2 files changed, 19 insertions(+), 14 deletions(-)

diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index 27eeab3..4cba9c2 100644
--- a/mm/sparse-vmemmap.c
+++ b/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;
 	}
diff --git a/mm/sparse.c b/mm/sparse.c
index 8cc7be0..63c3ea5 100644
--- a/mm/sparse.c
+++ b/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))
@@ -545,7 +548,7 @@ 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,
@@ -553,7 +556,7 @@ void __init sparse_init(void)
 
 #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
-- 
1.7.9.5