[PATCH 2/3] x86/numa_emulation: assign physnode_mask directly from numa_nodes_parsed

[Wei Yang <richard.weiyang@gmail.com>]

According to current code path, numa_nodes_parsed is already setup when
numa_emucation() is called.

    x86_numa_init()
        numa_init()
	    init_func()

	    numa_emulation()

            numa_register_memblks()

This means we can get the physnode_mask directly from numa_nodes_parsed. At
the same time, this patch correct the comment of these two functions.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
 arch/x86/mm/numa_emulation.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/arch/x86/mm/numa_emulation.c b/arch/x86/mm/numa_emulation.c
index eb017c816de6..a6d01931b9a1 100644
--- a/arch/x86/mm/numa_emulation.c
+++ b/arch/x86/mm/numa_emulation.c
@@ -75,13 +75,15 @@ static int __init emu_setup_memblk(struct numa_meminfo *ei,
 
 /*
  * Sets up nr_nodes fake nodes interleaved over physical nodes ranging from addr
- * to max_addr.  The return value is the number of nodes allocated.
+ * to max_addr.
+ *
+ * Returns zero on success or negative error code.
  */
 static int __init split_nodes_interleave(struct numa_meminfo *ei,
 					 struct numa_meminfo *pi,
 					 u64 addr, u64 max_addr, int nr_nodes)
 {
-	nodemask_t physnode_mask = NODE_MASK_NONE;
+	nodemask_t physnode_mask = numa_nodes_parsed;
 	u64 size;
 	int big;
 	int nid = 0;
@@ -116,9 +118,6 @@ static int __init split_nodes_interleave(struct numa_meminfo *ei,
 		return -1;
 	}
 
-	for (i = 0; i < pi->nr_blks; i++)
-		node_set(pi->blk[i].nid, physnode_mask);
-
 	/*
 	 * Continue to fill physical nodes with fake nodes until there is no
 	 * memory left on any of them.
@@ -200,13 +199,15 @@ static u64 __init find_end_of_node(u64 start, u64 max_addr, u64 size)
 
 /*
  * Sets up fake nodes of `size' interleaved over physical nodes ranging from
- * `addr' to `max_addr'.  The return value is the number of nodes allocated.
+ * `addr' to `max_addr'.
+ *
+ * Returns zero on success or negative error code.
  */
 static int __init split_nodes_size_interleave(struct numa_meminfo *ei,
 					      struct numa_meminfo *pi,
 					      u64 addr, u64 max_addr, u64 size)
 {
-	nodemask_t physnode_mask = NODE_MASK_NONE;
+	nodemask_t physnode_mask = numa_nodes_parsed;
 	u64 min_size;
 	int nid = 0;
 	int i, ret;
@@ -231,9 +232,6 @@ static int __init split_nodes_size_interleave(struct numa_meminfo *ei,
 	}
 	size &= FAKE_NODE_MIN_HASH_MASK;
 
-	for (i = 0; i < pi->nr_blks; i++)
-		node_set(pi->blk[i].nid, physnode_mask);
-
 	/*
 	 * Fill physical nodes with fake nodes of size until there is no memory
 	 * left on any of them.
-- 
2.11.0