linux-kernel - [PATCH 2/2] mm/memblock: switch to use NUMA_NO_NODE instead of MAX_NUMNODES in for_each_mem_pfn

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Date:   Fri, 27 Jan 2017 09:59:22 +0800
From:   Wei Yang <richard.weiyang@...il.com>
To:     tglx@...utronix.de, mingo@...hat.com, hpa@...or.com
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Wei Yang <richard.weiyang@...il.com>
Subject: [PATCH 2/2] mm/memblock: switch to use NUMA_NO_NODE instead of MAX_NUMNODES in for_each_mem_pfn_range()

As in commit <b115423357e0> '(mm/memblock: switch to use NUMA_NO_NODE
instead of MAX_NUMNODES)', NUMA_NO_NODE is recommended to be the selector
of the nid.

This patch does the same thing.

Signed-off-by: Wei Yang <richard.weiyang@...il.com>
---
 include/linux/memblock.h | 2 +-
 mm/memblock.c            | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 5b759c9acf97..4bf9d3f7c539 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -207,7 +207,7 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
 /**
  * for_each_mem_pfn_range - early memory pfn range iterator
  * @i: an integer used as loop variable
- * @nid: node selector, %MAX_NUMNODES for all nodes
+ * @nid: node selector, %NUMA_NO_NODE for all nodes
  * @p_start: ptr to ulong for start pfn of the range, can be %NULL
  * @p_end: ptr to ulong for end pfn of the range, can be %NULL
  * @p_nid: ptr to int for nid of the range, can be %NULL
diff --git a/mm/memblock.c b/mm/memblock.c
index 7d27566cee11..8d41421aa589 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1084,12 +1084,16 @@ void __init_memblock __next_mem_pfn_range(int *idx, int nid,
 	struct memblock_type *type = &memblock.memory;
 	struct memblock_region *r;
 
+	if (WARN_ONCE(nid == MAX_NUMNODES,
+	"Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n"))
+		nid = NUMA_NO_NODE;
+
 	while (++*idx < type->cnt) {
 		r = &type->regions[*idx];
 
 		if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size))
 			continue;
-		if (nid == MAX_NUMNODES || nid == r->nid)
+		if (nid == NUMA_NO_NODE || nid == r->nid)
 			break;
 	}
 	if (*idx >= type->cnt) {
-- 
2.11.0