Commit 8a9ca34c authored by Tejun Heo's avatar Tejun Heo Committed by H. Peter Anvin

memblock, x86: Replace __get_free_all_memory_range() with for_each_free_mem_range()

__get_free_all_memory_range() walks memblock, calculates free memory
areas and fills in the specified range.  It can be easily replaced
with for_each_free_mem_range().

Convert free_low_memory_core_early() and
add_highpages_with_active_regions() to for_each_free_mem_range().
This leaves __get_free_all_memory_range() without any user.  Kill it
and related functions.
Signed-off-by: default avatarTejun Heo <>
Cc: Yinghai Lu <>
Cc: Benjamin Herrenschmidt <>
Cc: Thomas Gleixner <>
Cc: Ingo Molnar <>
Cc: "H. Peter Anvin" <>
Signed-off-by: default avatarH. Peter Anvin <>
parent 64a02daa
......@@ -5,9 +5,6 @@
void memblock_x86_reserve_range(u64 start, u64 end, char *name);
void memblock_x86_free_range(u64 start, u64 end);
struct range;
int __get_free_all_memory_range(struct range **range, int nodeid,
unsigned long start_pfn, unsigned long end_pfn);
u64 memblock_x86_hole_size(u64 start, u64 end);
u64 memblock_x86_free_memory_in_range(u64 addr, u64 limit);
......@@ -427,23 +427,17 @@ static void __init add_one_highpage_init(struct page *page)
void __init add_highpages_with_active_regions(int nid,
unsigned long start_pfn, unsigned long end_pfn)
struct range *range;
int nr_range;
int i;
nr_range = __get_free_all_memory_range(&range, nid, start_pfn, end_pfn);
for (i = 0; i < nr_range; i++) {
struct page *page;
int node_pfn;
for (node_pfn = range[i].start; node_pfn < range[i].end;
node_pfn++) {
if (!pfn_valid(node_pfn))
page = pfn_to_page(node_pfn);
phys_addr_t start, end;
u64 i;
for_each_free_mem_range(i, nid, &start, &end, NULL) {
unsigned long pfn = clamp_t(unsigned long, PFN_UP(start),
start_pfn, end_pfn);
unsigned long e_pfn = clamp_t(unsigned long, PFN_DOWN(end),
start_pfn, end_pfn);
for ( ; pfn < e_pfn; pfn++)
if (pfn_valid(pfn))
......@@ -30,65 +30,6 @@ static __init struct range *find_range_array(int count)
return range;
static void __init memblock_x86_subtract_reserved(struct range *range, int az)
u64 final_start, final_end;
struct memblock_region *r;
/* Take out region array itself at first*/
memblock_dbg("Subtract (%ld early reservations)\n", memblock.reserved.cnt);
for_each_memblock(reserved, r) {
memblock_dbg(" [%010llx-%010llx]\n", (u64)r->base, (u64)r->base + r->size - 1);
final_start = PFN_DOWN(r->base);
final_end = PFN_UP(r->base + r->size);
if (final_start >= final_end)
subtract_range(range, az, final_start, final_end);
/* Put region array back ? */
static int __init count_early_node_map(int nodeid)
int i, cnt = 0;
for_each_mem_pfn_range(i, nodeid, NULL, NULL, NULL)
return cnt;
int __init __get_free_all_memory_range(struct range **rangep, int nodeid,
unsigned long start_pfn, unsigned long end_pfn)
int count;
struct range *range;
int nr_range;
count = (memblock.reserved.cnt + count_early_node_map(nodeid)) * 2;
range = find_range_array(count);
nr_range = 0;
* Use early_node_map[] and memblock.reserved.region to get range array
* at first
nr_range = add_from_early_node_map(range, count, nr_range, nodeid);
subtract_range(range, count, 0, start_pfn);
subtract_range(range, count, end_pfn, -1ULL);
memblock_x86_subtract_reserved(range, count);
nr_range = clean_sort_range(range, count);
*rangep = range;
return nr_range;
static u64 __init __memblock_x86_memory_in_range(u64 addr, u64 limit, bool get_free)
int i, count;
......@@ -108,21 +108,25 @@ static void __init __free_pages_memory(unsigned long start, unsigned long end)
unsigned long __init free_low_memory_core_early(int nodeid)
int i;
u64 start, end;
unsigned long count = 0;
struct range *range = NULL;
int nr_range;
nr_range = __get_free_all_memory_range(&range, nodeid, 0, max_low_pfn);
for (i = 0; i < nr_range; i++) {
start = range[i].start;
end = range[i].end;
count += end - start;
__free_pages_memory(start, end);
phys_addr_t start, end;
u64 i;
/* free reserved array temporarily so that it's treated as free area */
for_each_free_mem_range(i, MAX_NUMNODES, &start, &end, NULL) {
unsigned long start_pfn = PFN_UP(start);
unsigned long end_pfn = min_t(unsigned long,
PFN_DOWN(end), max_low_pfn);
if (start_pfn < end_pfn) {
__free_pages_memory(start_pfn, end_pfn);
count += end_pfn - start_pfn;
/* put region array back? */
return count;
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