arch, mm: replace for_each_memblock() with for_each_mem_pfn_range()

There are several occurrences of the following pattern:

	for_each_memblock(memory, reg) {
		start_pfn = memblock_region_memory_base_pfn(reg);
		end_pfn = memblock_region_memory_end_pfn(reg);

		/* do something with start_pfn and end_pfn */
	}

Rather than iterate over all memblock.memory regions and each time query
for their start and end PFNs, use for_each_mem_pfn_range() iterator to get
simpler and clearer code.

Signed-off-by: Mike Rapoport <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Reviewed-by: Baoquan He <[email protected]>
Acked-by: Miguel Ojeda <[email protected]>	[.clang-format]
Cc: Andy Lutomirski <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Daniel Axtens <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Emil Renner Berthing <[email protected]>
Cc: Hari Bathini <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jonathan Cameron <[email protected]>
Cc: Marek Szyprowski <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Russell King <[email protected]>
Cc: Stafford Horne <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

1 files changed, 4 insertions, 6 deletions

diff --git a/mm/sparse.c b/mm/sparse.c
index fcc3d176f1ea..b25ad8e64839 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -291,13 +291,11 @@ static void __init memory_present(int nid, unsigned long start, unsigned long en
  */
 static void __init memblocks_present(void)
 {
-	struct memblock_region *reg;
+	unsigned long start, end;
+	int i, nid;
 
-	for_each_memblock(memory, reg) {
-		memory_present(memblock_get_region_node(reg),
-			       memblock_region_memory_base_pfn(reg),
-			       memblock_region_memory_end_pfn(reg));
-	}
+	for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, &nid)
+		memory_present(nid, start, end);
 }
 
 /*