[PATCH v2 17/17] memblock: use separate iterators for memory and reserved regions

[Mike Rapoport <rppt@kernel.org>]

From: Mike Rapoport <rppt@linux.ibm.com>

for_each_memblock() is used to iterate over memblock.memory in
a few places that use data from memblock_region rather than the memory
ranges.

Introduce separate for_each_mem_region() and for_each_reserved_mem_region()
to improve encapsulation of memblock internals from its users.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
 .clang-format                  |  3 ++-
 arch/arm64/kernel/setup.c      |  2 +-
 arch/arm64/mm/numa.c           |  2 +-
 arch/mips/netlogic/xlp/setup.c |  2 +-
 arch/x86/mm/numa.c             |  2 +-
 include/linux/memblock.h       | 19 ++++++++++++++++---
 mm/memblock.c                  |  4 ++--
 mm/page_alloc.c                |  8 ++++----
 8 files changed, 28 insertions(+), 14 deletions(-)

diff --git a/.clang-format b/.clang-format
index e28a849a1c58..cff71d345456 100644
--- a/.clang-format
+++ b/.clang-format
@@ -201,7 +201,7 @@ ForEachMacros:
   - 'for_each_matching_node'
   - 'for_each_matching_node_and_match'
   - 'for_each_member'
-  - 'for_each_memblock'
+  - 'for_each_mem_region'
   - 'for_each_memblock_type'
   - 'for_each_memcg_cache_index'
   - 'for_each_mem_pfn_range'
@@ -267,6 +267,7 @@ ForEachMacros:
   - 'for_each_property_of_node'
   - 'for_each_registered_fb'
   - 'for_each_reserved_mem_range'
+  - 'for_each_reserved_mem_region'
   - 'for_each_rtd_codec_dais'
   - 'for_each_rtd_codec_dais_rollback'
   - 'for_each_rtd_components'
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index f3aec7244aab..52ea2f1a7184 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -217,7 +217,7 @@ static void __init request_standard_resources(void)
 	if (!standard_resources)
 		panic("%s: Failed to allocate %zu bytes\n", __func__, res_size);
 
-	for_each_memblock(memory, region) {
+	for_each_mem_region(region) {
 		res = &standard_resources[i++];
 		if (memblock_is_nomap(region)) {
 			res->name  = "reserved";
diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
index 0cbdbcc885fb..f121e42246a6 100644
--- a/arch/arm64/mm/numa.c
+++ b/arch/arm64/mm/numa.c
@@ -350,7 +350,7 @@ static int __init numa_register_nodes(void)
 	struct memblock_region *mblk;
 
 	/* Check that valid nid is set to memblks */
-	for_each_memblock(memory, mblk) {
+	for_each_mem_region(mblk) {
 		int mblk_nid = memblock_get_region_node(mblk);
 
 		if (mblk_nid = NUMA_NO_NODE || mblk_nid >= MAX_NUMNODES) {
diff --git a/arch/mips/netlogic/xlp/setup.c b/arch/mips/netlogic/xlp/setup.c
index 1a0fc5b62ba4..6e3102bcd2f1 100644
--- a/arch/mips/netlogic/xlp/setup.c
+++ b/arch/mips/netlogic/xlp/setup.c
@@ -70,7 +70,7 @@ static void nlm_fixup_mem(void)
 	const int pref_backup = 512;
 	struct memblock_region *mem;
 
-	for_each_memblock(memory, mem) {
+	for_each_mem_region(mem) {
 		memblock_remove(mem->base + mem->size - pref_backup,
 			pref_backup);
 	}
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 8ee952038c80..fe6ea18d6923 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -516,7 +516,7 @@ static void __init numa_clear_kernel_node_hotplug(void)
 	 *   memory ranges, because quirks such as trim_snb_memory()
 	 *   reserve specific pages for Sandy Bridge graphics. ]
 	 */
-	for_each_memblock(reserved, mb_region) {
+	for_each_reserved_mem_region(mb_region) {
 		int nid = memblock_get_region_node(mb_region);
 
 		if (nid != MAX_NUMNODES)
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 9e51b3fd4134..a6970e058bd7 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -522,9 +522,22 @@ static inline unsigned long memblock_region_reserved_end_pfn(const struct memblo
 	return PFN_UP(reg->base + reg->size);
 }
 
-#define for_each_memblock(memblock_type, region)					\
-	for (region = memblock.memblock_type.regions;					\
-	     region < (memblock.memblock_type.regions + memblock.memblock_type.cnt);	\
+/**
+ * for_each_mem_region - itereate over registered memory regions
+ * @region: loop variable
+ */
+#define for_each_mem_region(region)					\
+	for (region = memblock.memory.regions;				\
+	     region < (memblock.memory.regions + memblock.memory.cnt);	\
+	     region++)
+
+/**
+ * for_each_reserved_mem_region - itereate over reserved memory regions
+ * @region: loop variable
+ */
+#define for_each_reserved_mem_region(region)				\
+	for (region = memblock.reserved.regions;			\
+	     region < (memblock.reserved.regions + memblock.reserved.cnt); \
 	     region++)
 
 extern void *alloc_large_system_hash(const char *tablename,
diff --git a/mm/memblock.c b/mm/memblock.c
index dadf579f7c53..7d30db5c539f 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1653,7 +1653,7 @@ static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit)
 	 * the memory memblock regions, if the @limit exceeds the total size
 	 * of those regions, max_addr will keep original value PHYS_ADDR_MAX
 	 */
-	for_each_memblock(memory, r) {
+	for_each_mem_region(r) {
 		if (limit <= r->size) {
 			max_addr = r->base + limit;
 			break;
@@ -1823,7 +1823,7 @@ void __init_memblock memblock_trim_memory(phys_addr_t align)
 	phys_addr_t start, end, orig_start, orig_end;
 	struct memblock_region *r;
 
-	for_each_memblock(memory, r) {
+	for_each_mem_region(r) {
 		orig_start = r->base;
 		orig_end = r->base + r->size;
 		start = round_up(orig_start, align);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 95af111d69d3..948c7a754cdb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5927,7 +5927,7 @@ overlap_memmap_init(unsigned long zone, unsigned long *pfn)
 
 	if (mirrored_kernelcore && zone = ZONE_MOVABLE) {
 		if (!r || *pfn >= memblock_region_memory_end_pfn(r)) {
-			for_each_memblock(memory, r) {
+			for_each_mem_region(r) {
 				if (*pfn < memblock_region_memory_end_pfn(r))
 					break;
 			}
@@ -6528,7 +6528,7 @@ static unsigned long __init zone_absent_pages_in_node(int nid,
 		unsigned long start_pfn, end_pfn;
 		struct memblock_region *r;
 
-		for_each_memblock(memory, r) {
+		for_each_mem_region(r) {
 			start_pfn = clamp(memblock_region_memory_base_pfn(r),
 					  zone_start_pfn, zone_end_pfn);
 			end_pfn = clamp(memblock_region_memory_end_pfn(r),
@@ -7122,7 +7122,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
 	 * options.
 	 */
 	if (movable_node_is_enabled()) {
-		for_each_memblock(memory, r) {
+		for_each_mem_region(r) {
 			if (!memblock_is_hotpluggable(r))
 				continue;
 
@@ -7143,7 +7143,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
 	if (mirrored_kernelcore) {
 		bool mem_below_4gb_not_mirrored = false;
 
-		for_each_memblock(memory, r) {
+		for_each_mem_region(r) {
 			if (memblock_is_mirror(r))
 				continue;
 
-- 
2.26.2