linux-kernel - [PATCH 3/4] x86, numa: cleanup x86_acpi_numa

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Date:	Fri, 18 Feb 2011 10:59:27 -0800 (PST)
From:	Yinghai Lu <yinghai@...nel.org>
To:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>, Tejun Heo <tj@...nel.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	David Rientjes <rientjes@...gle.com>,
	Cyrill Gorcunov <gorcunov@...il.com>
Subject: [PATCH 3/4] x86, numa: cleanup x86_acpi_numa_init()


make it more readable. put valid checking together.

Also restore old acpi_numa_init(). we don't need to touch it
because already have x86 own wrapper.

We can limit change to x86 code only.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>

---
 arch/x86/mm/srat_64.c |   13 ++++++++++++-
 drivers/acpi/numa.c   |    8 +++-----
 2 files changed, 15 insertions(+), 6 deletions(-)

Index: linux-2.6/arch/x86/mm/srat_64.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/srat_64.c
+++ linux-2.6/arch/x86/mm/srat_64.c
@@ -240,9 +240,20 @@ int __init x86_acpi_numa_init(void)
 	int ret;
 
 	ret = acpi_numa_init();
+
+	/* no srat */
+	if (!ret)
+		return -ENOENT;
+
+	/* parse failed */
 	if (ret < 0)
 		return ret;
-	return srat_disabled() ? -EINVAL : 0;
+
+	/* bad_srat() */
+	if (srat_disabled())
+		return -EINVAL;
+
+	return 0;
 }
 
 #if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) || defined(CONFIG_ACPI_HOTPLUG_MEMORY)
Index: linux-2.6/drivers/acpi/numa.c
===================================================================
--- linux-2.6.orig/drivers/acpi/numa.c
+++ linux-2.6/drivers/acpi/numa.c
@@ -274,7 +274,7 @@ acpi_table_parse_srat(enum acpi_srat_typ
 
 int __init acpi_numa_init(void)
 {
-	int cnt = 0;
+	int ret = 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);
-		cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
+		ret = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
 					    acpi_parse_memory_affinity,
 					    NR_NODE_MEMBLKS);
 	}
@@ -298,9 +298,7 @@ int __init acpi_numa_init(void)
 
 	acpi_numa_arch_fixup();
 
-	if (cnt <= 0)
-		return cnt ?: -ENOENT;
-	return 0;
+	return ret;
 }
 
 int acpi_get_pxm(acpi_handle h)
--
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