Commit cc289894 authored by Yinghai Lu's avatar Yinghai Lu Committed by Tejun Heo
Browse files

mm: Move early_node_map[] reverse scan helpers under HAVE_MEMBLOCK 



Heiko found recent memblock change triggers these warnings on s390:

  mm/page_alloc.c:3623:22: warning: 'last_active_region_index_in_nid' defined but not used
  mm/page_alloc.c:3638:22: warning: 'previous_active_region_index_in_nid' defined but not used

Need to move those two function under HAVE_MEMBLOCK with its only
user, find_memory_core_early().

-tj: Minor updates to description.

Reported-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 1f565a89

mm/page_alloc.c

+32 −32
Original line number Diff line number Diff line
@@ -3616,34 +3616,6 @@ static int __meminit next_active_region_index_in_nid(int index, int nid) 
	return -1;

}



/*

 * Basic iterator support. Return the last range of PFNs for a node

 * Note: nid == MAX_NUMNODES returns last region regardless of node

 */

static int __meminit last_active_region_index_in_nid(int nid)

{

	int i;



	for (i = nr_nodemap_entries - 1; i >= 0; i--)

		if (nid == MAX_NUMNODES || early_node_map[i].nid == nid)

			return i;



	return -1;

}



/*

 * Basic iterator support. Return the previous active range of PFNs for a node

 * Note: nid == MAX_NUMNODES returns next region regardless of node

 */

static int __meminit previous_active_region_index_in_nid(int index, int nid)

{

	for (index = index - 1; index >= 0; index--)

		if (nid == MAX_NUMNODES || early_node_map[index].nid == nid)

			return index;



	return -1;

}



#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID

/*

 * Required by SPARSEMEM. Given a PFN, return what node the PFN is on.
@@ -3695,10 +3667,6 @@ bool __meminit early_pfn_in_nid(unsigned long pfn, int node) 
	for (i = first_active_region_index_in_nid(nid); i != -1; \

				i = next_active_region_index_in_nid(i, nid))



#define for_each_active_range_index_in_nid_reverse(i, nid) \

	for (i = last_active_region_index_in_nid(nid); i != -1; \

				i = previous_active_region_index_in_nid(i, nid))



/**

 * free_bootmem_with_active_regions - Call free_bootmem_node for each active range

 * @nid: The node to free memory on. If MAX_NUMNODES, all nodes are freed.
@@ -3731,6 +3699,38 @@ void __init free_bootmem_with_active_regions(int nid, 
}



#ifdef CONFIG_HAVE_MEMBLOCK

/*

 * Basic iterator support. Return the last range of PFNs for a node

 * Note: nid == MAX_NUMNODES returns last region regardless of node

 */

static int __meminit last_active_region_index_in_nid(int nid)

{

	int i;



	for (i = nr_nodemap_entries - 1; i >= 0; i--)

		if (nid == MAX_NUMNODES || early_node_map[i].nid == nid)

			return i;



	return -1;

}



/*

 * Basic iterator support. Return the previous active range of PFNs for a node

 * Note: nid == MAX_NUMNODES returns next region regardless of node

 */

static int __meminit previous_active_region_index_in_nid(int index, int nid)

{

	for (index = index - 1; index >= 0; index--)

		if (nid == MAX_NUMNODES || early_node_map[index].nid == nid)

			return index;



	return -1;

}



#define for_each_active_range_index_in_nid_reverse(i, nid) \

	for (i = last_active_region_index_in_nid(nid); i != -1; \

				i = previous_active_region_index_in_nid(i, nid))



u64 __init find_memory_core_early(int nid, u64 size, u64 align,

					u64 goal, u64 limit)

{

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