x86-64, NUMA: Unify {acpi|amd}_{numa_init|scan_nodes}() arguments and return values

The functions used during NUMA initialization - *_numa_init() and
*_scan_nodes() - have different arguments and return values.  Unify
them such that they all take no argument and return 0 on success and
-errno on failure.  This is in preparation for further NUMA init
cleanups.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>

7 files changed, 22 insertions, 19 deletions

diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 211ca3f7fd16..4e5dff9e0b39 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -187,7 +187,7 @@ struct bootnode;
 extern int acpi_numa;
 extern void acpi_get_nodes(struct bootnode *physnodes, unsigned long start,
                                 unsigned long end);
-extern int acpi_scan_nodes(unsigned long start, unsigned long end);
+extern int acpi_scan_nodes(void);
 #define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
 
 #ifdef CONFIG_NUMA_EMU
diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h
index 2b33c4df979f..dc3c6e34da1d 100644
--- a/arch/x86/include/asm/amd_nb.h
+++ b/arch/x86/include/asm/amd_nb.h
@@ -16,7 +16,7 @@ struct bootnode;
 extern int early_is_amd_nb(u32 value);
 extern int amd_cache_northbridges(void);
 extern void amd_flush_garts(void);
-extern int amd_numa_init(unsigned long start_pfn, unsigned long end_pfn);
+extern int amd_numa_init(void);
 extern int amd_scan_nodes(void);
 extern int amd_get_subcaches(int);
 extern int amd_set_subcaches(int, int);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 756d640723f9..96810a3c6003 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -995,12 +995,12 @@ void __init setup_arch(char **cmdline_p)
         /*
          * Parse SRAT to discover nodes.
          */
-        acpi = acpi_numa_init();
+        acpi = !acpi_numa_init();
 #endif
 
 #ifdef CONFIG_AMD_NUMA
         if (!acpi)
-                amd = !amd_numa_init(0, max_pfn);
+                amd = !amd_numa_init();
 #endif
 
         initmem_init(acpi, amd);
diff --git a/arch/x86/mm/amdtopology_64.c b/arch/x86/mm/amdtopology_64.c
index 2523c3554de5..655ccffc6ee5 100644
--- a/arch/x86/mm/amdtopology_64.c
+++ b/arch/x86/mm/amdtopology_64.c
@@ -51,7 +51,7 @@ static __init int find_northbridge(void)
                 return num;
         }
 
-        return -1;
+        return -ENOENT;
 }
 
 static __init void early_get_boot_cpu_id(void)
@@ -69,17 +69,17 @@ static __init void early_get_boot_cpu_id(void)
 #endif
 }
 
-int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
+int __init amd_numa_init(void)
 {
-        unsigned long start = PFN_PHYS(start_pfn);
-        unsigned long end = PFN_PHYS(end_pfn);
+        unsigned long start = PFN_PHYS(0);
+        unsigned long end = PFN_PHYS(max_pfn);
         unsigned numnodes;
         unsigned long prevbase;
         int i, nb, found = 0;
         u32 nodeid, reg;
 
         if (!early_pci_allowed())
-                return -1;
+                return -EINVAL;
 
         nb = find_northbridge();
         if (nb < 0)
@@ -90,7 +90,7 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
         reg = read_pci_config(0, nb, 0, 0x60);
         numnodes = ((reg >> 4) & 0xF) + 1;
         if (numnodes <= 1)
-                return -1;
+                return -ENOENT;
 
         pr_info("Number of physical nodes %d\n", numnodes);
 
@@ -121,7 +121,7 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
                 if ((base >> 8) & 3 || (limit >> 8) & 3) {
                         pr_err("Node %d using interleaving mode %lx/%lx\n",
                                nodeid, (base >> 8) & 3, (limit >> 8) & 3);
-                        return -1;
+                        return -EINVAL;
                 }
                 if (node_isset(nodeid, nodes_parsed)) {
                         pr_info("Node %d already present, skipping\n",
@@ -160,7 +160,7 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
                 if (prevbase > base) {
                         pr_err("Node map not sorted %lx,%lx\n",
                                prevbase, base);
-                        return -1;
+                        return -EINVAL;
                 }
 
                 pr_info("Node %d MemBase %016lx Limit %016lx\n",
@@ -177,7 +177,7 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
         }
 
         if (!found)
-                return -1;
+                return -ENOENT;
         return 0;
 }
 
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index d7e4aafd0759..a083f515f004 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -596,7 +596,7 @@ void __init initmem_init(int acpi, int amd)
 #endif
 
 #ifdef CONFIG_ACPI_NUMA
-        if (!numa_off && acpi && !acpi_scan_nodes(0, max_pfn << PAGE_SHIFT))
+        if (!numa_off && acpi && !acpi_scan_nodes())
                 return;
         nodes_clear(node_possible_map);
         nodes_clear(node_online_map);
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 988b0b70ff39..4f9dbf066ca4 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -359,7 +359,7 @@ void __init acpi_get_nodes(struct bootnode *physnodes, unsigned long start,
 #endif /* CONFIG_NUMA_EMU */
 
 /* Use the information discovered above to actually set up the nodes. */
-int __init acpi_scan_nodes(unsigned long start, unsigned long end)
+int __init acpi_scan_nodes(void)
 {
         int i;
 
@@ -368,7 +368,7 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
 
         /* First clean up the node list */
         for (i = 0; i < MAX_NUMNODES; i++)
-                cutoff_node(i, start, end);
+                cutoff_node(i, 0, max_pfn << PAGE_SHIFT);
 
         /*
          * Join together blocks on the same node, holes between
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index 5eb25eb3ea48..3b5c3189fd99 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -274,7 +274,7 @@ acpi_table_parse_srat(enum acpi_srat_type id,
 
 int __init acpi_numa_init(void)
 {
-        int ret = 0;
+        int cnt = 0;
 
         /*
          * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
@@ -288,7 +288,7 @@ int __init acpi_numa_init(void)
                                      acpi_parse_x2apic_affinity, 0);
                 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
                                      acpi_parse_processor_affinity, 0);
-                ret = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
+                cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
                                             acpi_parse_memory_affinity,
                                             NR_NODE_MEMBLKS);
         }
@@ -297,7 +297,10 @@ int __init acpi_numa_init(void)
         acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
 
         acpi_numa_arch_fixup();
-        return ret;
+
+        if (cnt <= 0)
+                return cnt ?: -ENOENT;
+        return 0;
 }
 
 int acpi_get_pxm(acpi_handle h)