[PATCH v2 1/2] memblock: drop for_each_memblock_type() and open code its users

[Tarun Sahu]

for_each_memblock_type() always starts the iteration at index 0 and its
body is a trivial 'for' loop, so it hides very little. It also gets in
the way of iterating from an arbitrary index, which the next patch
needs.

Remove the macro and open code its three users: memblock_add_range(),
memblock_isolate_range() and memblock_dump(). While at it, move the
region pointer into the loop body scope.

No functional change.

Signed-off-by: Tarun Sahu <tarunsahu at google.com>
---
 mm/memblock.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/mm/memblock.c b/mm/memblock.c
index 9ce86349a29f..5aae75d34dec 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -155,11 +155,6 @@ struct memblock_type physmem = {
  */
 static __refdata struct memblock_type *memblock_memory = &memblock.memory;
 
-#define for_each_memblock_type(i, memblock_type, rgn)			\
-	for (i = 0, rgn = &memblock_type->regions[0];			\
-	     i < memblock_type->cnt;					\
-	     i++, rgn = &memblock_type->regions[i])
-
 #define memblock_dbg(fmt, ...)						\
 	do {								\
 		if (memblock_debug)					\
@@ -651,7 +646,8 @@ static int __init_memblock memblock_add_range(struct memblock_type *type,
 	base = obase;
 	nr_new = 0;
 
-	for_each_memblock_type(idx, type, rgn) {
+	for (idx = 0; idx < type->cnt; idx++) {
+		rgn = &type->regions[idx];
 		phys_addr_t rbase = rgn->base;
 		phys_addr_t rend = rbase + rgn->size;
 
@@ -827,7 +823,8 @@ static int __init_memblock memblock_isolate_range(struct memblock_type *type,
 		if (memblock_double_array(type, base, size) < 0)
 			return -ENOMEM;
 
-	for_each_memblock_type(idx, type, rgn) {
+	for (idx = 0; idx < type->cnt; idx++) {
+		rgn = &type->regions[idx];
 		phys_addr_t rbase = rgn->base;
 		phys_addr_t rend = rbase + rgn->size;
 
@@ -2198,7 +2195,8 @@ static void __init_memblock memblock_dump(struct memblock_type *type)
 
 	pr_info(" %s.cnt  = 0x%lx\n", type->name, type->cnt);
 
-	for_each_memblock_type(idx, type, rgn) {
+	for (idx = 0; idx < type->cnt; idx++) {
+		rgn = &type->regions[idx];
 		char nid_buf[32] = "";
 
 		base = rgn->base;
-- 
2.55.0.1082.g2b9226bbc0-goog