ARM: memblock: convert free_highpages() to use memblock
Free the high pages using the memblock memory lists - and more
importantly, exclude any memblock allocations in highmem from the
free'd memory.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 1b4e0ab..5422821 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -439,13 +439,47 @@
static void __init free_highpages(void)
{
#ifdef CONFIG_HIGHMEM
- int i;
+ unsigned long max_low = max_low_pfn + PHYS_PFN_OFFSET;
+ struct memblock_region *mem, *res;
/* set highmem page free */
- for_each_bank (i, &meminfo) {
- unsigned long start = bank_pfn_start(&meminfo.bank[i]);
- unsigned long end = bank_pfn_end(&meminfo.bank[i]);
- if (start >= max_low_pfn + PHYS_PFN_OFFSET)
+ for_each_memblock(memory, mem) {
+ unsigned long start = memblock_region_memory_base_pfn(mem);
+ unsigned long end = memblock_region_memory_end_pfn(mem);
+
+ /* Ignore complete lowmem entries */
+ if (end <= max_low)
+ continue;
+
+ /* Truncate partial highmem entries */
+ if (start < max_low)
+ start = max_low;
+
+ /* Find and exclude any reserved regions */
+ for_each_memblock(reserved, res) {
+ unsigned long res_start, res_end;
+
+ res_start = memblock_region_reserved_base_pfn(res);
+ res_end = memblock_region_reserved_end_pfn(res);
+
+ if (res_end < start)
+ continue;
+ if (res_start < start)
+ res_start = start;
+ if (res_start > end)
+ res_start = end;
+ if (res_end > end)
+ res_end = end;
+ if (res_start != start)
+ totalhigh_pages += free_area(start, res_start,
+ NULL);
+ start = res_end;
+ if (start == end)
+ break;
+ }
+
+ /* And now free anything which remains */
+ if (start < end)
totalhigh_pages += free_area(start, end, NULL);
}
totalram_pages += totalhigh_pages;