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


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