MIPS: Netlogic: Add macro for node present

Add macro nlm_node_present() that can be used to check if a node is present
in a multi-chip configuration. This can be used even when NUMA is not enabled.
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6272/

arch/mips/include/asm/mach-netlogic/multi-node.h

@@ -63,6 +63,8 @@ struct nlm_soc_info {
 
 extern struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
 #define nlm_get_node(i)		(&nlm_nodes[i])
+#define nlm_node_present(n)	((n) >= 0 && (n) < NLM_NR_NODES && \
+					nlm_get_node(n)->coremask != 0)
 #ifdef CONFIG_CPU_XLR
 #define nlm_current_node()	(&nlm_nodes[0])
 #else

arch/mips/pci/pci-xlp.c

@@ -235,7 +235,6 @@ static inline void xlp_config_pci_bswap(int node, int link) {}
 
 static int __init pcibios_init(void)
 {
-	struct nlm_soc_info *nodep;
 	uint64_t pciebase;
 	int link, n;
 	u32 reg;
@@ -249,9 +248,8 @@ static int __init pcibios_init(void)
 	ioport_resource.end   = ~0;
 
 	for (n = 0; n < NLM_NR_NODES; n++) {
-		nodep = nlm_get_node(n);
-		if (!nodep->coremask)
-			continue;	/* node does not exist */
+		if (!nlm_node_present(n))
+			continue;
 
 		for (link = 0; link < PCIE_NLINKS; link++) {
 			pciebase = nlm_get_pcie_base(n, link);