From c9118e6c37bff9ade90b638207a6e0db676ee6a9 Mon Sep 17 00:00:00 2001
From: Mike Rapoport <rppt@linux.ibm.com>
Date: Tue, 13 Oct 2020 16:58:03 -0700
Subject: 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 <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Baoquan He <bhe@redhat.com>
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@kernel.org>
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 Bogendoerfer <tsbogend@alpha.franken.de>
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/20200818151634.14343-12-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/memblock.c |  6 ++----
 mm/sparse.c   | 10 ++++------
 2 files changed, 6 insertions(+), 10 deletions(-)

(limited to 'mm')

diff --git a/mm/memblock.c b/mm/memblock.c
index e9b6efd74329..d66d805dec96 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1663,12 +1663,10 @@ phys_addr_t __init_memblock memblock_reserved_size(void)
 phys_addr_t __init memblock_mem_size(unsigned long limit_pfn)
 {
 	unsigned long pages = 0;
-	struct memblock_region *r;
 	unsigned long start_pfn, end_pfn;
+	int i;
 
-	for_each_memblock(memory, r) {
-		start_pfn = memblock_region_memory_base_pfn(r);
-		end_pfn = memblock_region_memory_end_pfn(r);
+	for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) {
 		start_pfn = min_t(unsigned long, start_pfn, limit_pfn);
 		end_pfn = min_t(unsigned long, end_pfn, limit_pfn);
 		pages += end_pfn - start_pfn;
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);
 }
 
 /*
-- 
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