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mm/memblock.c: use CONFIG_HAVE_MEMBLOCK_NODE_MAP to protect movablecore_map in memblock_overlaps_region().

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The definition of struct movablecore_map is protected by
CONFIG_HAVE_MEMBLOCK_NODE_MAP but its use in memblock_overlaps_region()
is not.  So add CONFIG_HAVE_MEMBLOCK_NODE_MAP to protect the use of
movablecore_map in memblock_overlaps_region().

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tang Chen 2013-02-22 16:33:51 -08:00 committed by Linus Torvalds
parent 01a178a94e
commit f7210e6c4a
2 changed files with 35 additions and 0 deletions
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1
include/linux/memblock.h
View File

@ -61,6 +61,7 @@ int memblock_reserve(phys_addr_t base, phys_addr_t size);
void memblock_trim_memory(phys_addr_t align);
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
unsigned long *out_end_pfn, int *out_nid);

34
mm/memblock.c
View File

@ -92,9 +92,13 @@ static long __init_memblock memblock_overlaps_region(struct memblock_type *type,
*
* Find @size free area aligned to @align in the specified range and node.
*
* If we have CONFIG_HAVE_MEMBLOCK_NODE_MAP defined, we need to check if the
* memory we found if not in hotpluggable ranges.
*
* RETURNS:
* Found address on success, %0 on failure.
*/
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
phys_addr_t end, phys_addr_t size,
phys_addr_t align, int nid)
@ -139,6 +143,36 @@ restart:
return 0;
}
#else /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
phys_addr_t end, phys_addr_t size,
phys_addr_t align, int nid)
{
phys_addr_t this_start, this_end, cand;
u64 i;
/* pump up @end */
if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
end = memblock.current_limit;
/* avoid allocating the first page */
start = max_t(phys_addr_t, start, PAGE_SIZE);
end = max(start, end);
for_each_free_mem_range_reverse(i, nid, &this_start, &this_end, NULL) {
this_start = clamp(this_start, start, end);
this_end = clamp(this_end, start, end);
if (this_end < size)
continue;
cand = round_down(this_end - size, align);
if (cand >= this_start)
return cand;
}
return 0;
}
#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
/**
* memblock_find_in_range - find free area in given range