memblock: use separate iterators for memory and reserved regions

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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Baoquan He <bhe@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>			[x86]
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>	[MIPS]
Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>	[.clang-format]
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Daniel Axtens <dja@axtens.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Emil Renner Berthing <kernel@esmil.dk>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: https://lkml.kernel.org/r/20200818151634.14343-18-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 6 insertions, 6 deletions

diff --git a/mm/memblock.c b/mm/memblock.c
index a09cc4f057f0..165f40a8a254 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1667,7 +1667,7 @@ 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;
@@ -1837,7 +1837,7 @@ 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 34ac7127d1e6..05fe1ddb033c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5961,7 +5961,7 @@ 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;
 			}
@@ -6546,7 +6546,7 @@ 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),
@@ -7140,7 +7140,7 @@ 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;
 
@@ -7161,7 +7161,7 @@ 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;