linux-kernel - [RFC 11/23] mm/page_alloc: Use memblock apis for early memory allocations

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Date:	Sat, 12 Oct 2013 17:58:54 -0400
From:	Santosh Shilimkar <santosh.shilimkar@...com>
To:	<tj@...nel.org>, <yinghai@...nel.org>
CC:	<linux-arm-kernel@...ts.infradead.org>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, <grygorii.strashko@...com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [RFC 11/23] mm/page_alloc: Use memblock apis for early memory allocations

Switch to memblock interfaces for early memory allocator

Cc: Yinghai Lu <yinghai@...nel.org>
Cc: Tejun Heo <tj@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>

Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@...com>
---
 mm/page_alloc.c |   26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0ee638f..a451ebd 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4218,7 +4218,6 @@ static noinline __init_refok
 int zone_wait_table_init(struct zone *zone, unsigned long zone_size_pages)
 {
 	int i;
-	struct pglist_data *pgdat = zone->zone_pgdat;
 	size_t alloc_size;
 
 	/*
@@ -4234,7 +4233,8 @@ int zone_wait_table_init(struct zone *zone, unsigned long zone_size_pages)
 
 	if (!slab_is_available()) {
 		zone->wait_table = (wait_queue_head_t *)
-			alloc_bootmem_node_nopanic(pgdat, alloc_size);
+			memblock_early_alloc_node_nopanic(
+				zone->zone_pgdat->node_id, alloc_size);
 	} else {
 		/*
 		 * This case means that a zone whose size was 0 gets new memory
@@ -4354,13 +4354,14 @@ bool __meminit early_pfn_in_nid(unsigned long pfn, int node)
 #endif
 
 /**
- * free_bootmem_with_active_regions - Call free_bootmem_node for each active range
+ * free_bootmem_with_active_regions - Call memblock_free_early_nid for each active range
  * @nid: The node to free memory on. If MAX_NUMNODES, all nodes are freed.
- * @max_low_pfn: The highest PFN that will be passed to free_bootmem_node
+ * @max_low_pfn: The highest PFN that will be passed to memblock_free_early_nid
  *
  * If an architecture guarantees that all ranges registered with
  * add_active_ranges() contain no holes and may be freed, this
- * this function may be used instead of calling free_bootmem() manually.
+ * this function may be used instead of calling memblock_free_early_nid()
+ * manually.
  */
 void __init free_bootmem_with_active_regions(int nid, unsigned long max_low_pfn)
 {
@@ -4372,9 +4373,8 @@ void __init free_bootmem_with_active_regions(int nid, unsigned long max_low_pfn)
 		end_pfn = min(end_pfn, max_low_pfn);
 
 		if (start_pfn < end_pfn)
-			free_bootmem_node(NODE_DATA(this_nid),
-					  PFN_PHYS(start_pfn),
-					  (end_pfn - start_pfn) << PAGE_SHIFT);
+			memblock_free_early_nid(this_nid, PFN_PHYS(start_pfn),
+					(end_pfn - start_pfn) << PAGE_SHIFT);
 	}
 }
 
@@ -4645,8 +4645,9 @@ static void __init setup_usemap(struct pglist_data *pgdat,
 	unsigned long usemapsize = usemap_size(zone_start_pfn, zonesize);
 	zone->pageblock_flags = NULL;
 	if (usemapsize)
-		zone->pageblock_flags = alloc_bootmem_node_nopanic(pgdat,
-								   usemapsize);
+		zone->pageblock_flags =
+			memblock_early_alloc_node_nopanic(pgdat->node_id,
+							  usemapsize);
 }
 #else
 static inline void setup_usemap(struct pglist_data *pgdat, struct zone *zone,
@@ -4840,7 +4841,8 @@ static void __init_refok alloc_node_mem_map(struct pglist_data *pgdat)
 		size =  (end - start) * sizeof(struct page);
 		map = alloc_remap(pgdat->node_id, size);
 		if (!map)
-			map = alloc_bootmem_node_nopanic(pgdat, size);
+			map = memblock_early_alloc_node_nopanic(pgdat->node_id,
+								size);
 		pgdat->node_mem_map = map + (pgdat->node_start_pfn - start);
 	}
 #ifndef CONFIG_NEED_MULTIPLE_NODES
@@ -5866,7 +5868,7 @@ void *__init alloc_large_system_hash(const char *tablename,
 	do {
 		size = bucketsize << log2qty;
 		if (flags & HASH_EARLY)
-			table = alloc_bootmem_nopanic(size);
+			table = memblock_early_alloc_nopanic(size);
 		else if (hashdist)
 			table = __vmalloc(size, GFP_ATOMIC, PAGE_KERNEL);
 		else {
-- 
1.7.9.5

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