[PATCH 05/26] x86-64, NUMA: Wrap acpi_numa_init() so that failure can be indicated by return value

[Tejun Heo <tj@kernel.org>]

Because of the way ACPI tables are parsed, the generic
acpi_numa_init() couldn't return failure when error was detected by
arch hooks.  Instead, the failure state was recorded and later arch
dependent init hook - acpi_scan_nodes() - would fail.

Wrap acpi_numa_init() with x86_acpi_numa_init() so that failure can be
indicated as return value immediately.  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>
---
 arch/x86/include/asm/acpi.h |    1 +
 arch/x86/kernel/setup.c     |    2 +-
 arch/x86/mm/srat_64.c       |   10 ++++++++++
 3 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 4e5dff9..06fb786 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -187,6 +187,7 @@ struct bootnode;
 extern int acpi_numa;
 extern void acpi_get_nodes(struct bootnode *physnodes, unsigned long start,
 				unsigned long end);
+extern int x86_acpi_numa_init(void);
 extern int acpi_scan_nodes(void);
 #define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
 
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 1870a59..f69d838 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -988,7 +988,7 @@ void __init setup_arch(char **cmdline_p)
 	/*
 	 * Parse SRAT to discover nodes.
 	 */
-	acpi = !acpi_numa_init();
+	acpi = !x86_acpi_numa_init();
 #endif
 
 #ifdef CONFIG_AMD_NUMA
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 19652dd..8d145ae 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -358,6 +358,16 @@ void __init acpi_get_nodes(struct bootnode *physnodes, unsigned long start,
 }
 #endif /* CONFIG_NUMA_EMU */
 
+int __init x86_acpi_numa_init(void)
+{
+	int ret;
+
+	ret = acpi_numa_init();
+	if (ret < 0)
+		return ret;
+	return srat_disabled() ? -EINVAL : 0;
+}
+
 /* Use the information discovered above to actually set up the nodes. */
 int __init acpi_scan_nodes(void)
 {
-- 
1.7.1