mm/memblock: use WARN_ONCE when MAX_NUMNODES passed as input parameter

Check nid parameter and produce warning if it has deprecated
MAX_NUMNODES value.  Also re-assign NUMA_NO_NODE value to the nid
parameter in this case.

These will help to identify the wrong API usage (the caller) and make
code simpler.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/memblock.c

diff --git a/mm/memblock.c b/mm/memblock.c
index 018e55d..1c2ef2c 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -785,11 +785,9 @@
 	struct memblock_type *rsv = &memblock.reserved;
 	int mi = *idx & 0xffffffff;
 	int ri = *idx >> 32;
-	bool check_node = (nid != NUMA_NO_NODE) && (nid != MAX_NUMNODES);
 
-	if (nid == MAX_NUMNODES)
-		pr_warn_once("%s: Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n",
-			     __func__);
+	if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n"))
+		nid = NUMA_NO_NODE;
 
 	for ( ; mi < mem->cnt; mi++) {
 		struct memblock_region *m = &mem->regions[mi];
@@ -797,7 +795,7 @@
 		phys_addr_t m_end = m->base + m->size;
 
 		/* only memory regions are associated with nodes, check it */
-		if (check_node && nid != memblock_get_region_node(m))
+		if (nid != NUMA_NO_NODE && nid != memblock_get_region_node(m))
 			continue;
 
 		/* scan areas before each reservation for intersection */
@@ -858,11 +856,9 @@
 	struct memblock_type *rsv = &memblock.reserved;
 	int mi = *idx & 0xffffffff;
 	int ri = *idx >> 32;
-	bool check_node = (nid != NUMA_NO_NODE) && (nid != MAX_NUMNODES);
 
-	if (nid == MAX_NUMNODES)
-		pr_warn_once("%s: Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n",
-			     __func__);
+	if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n"))
+		nid = NUMA_NO_NODE;
 
 	if (*idx == (u64)ULLONG_MAX) {
 		mi = mem->cnt - 1;
@@ -875,7 +871,7 @@
 		phys_addr_t m_end = m->base + m->size;
 
 		/* only memory regions are associated with nodes, check it */
-		if (check_node && nid != memblock_get_region_node(m))
+		if (nid != NUMA_NO_NODE && nid != memblock_get_region_node(m))
 			continue;
 
 		/* skip hotpluggable memory regions if needed */
@@ -1067,9 +1063,8 @@
 	phys_addr_t alloc;
 	void *ptr;
 
-	if (nid == MAX_NUMNODES)
-		pr_warn("%s: usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE\n",
-			__func__);
+	if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n"))
+		nid = NUMA_NO_NODE;
 
 	/*
 	 * Detect any accidental use of these APIs after slab is ready, as at