linux-kernel - [Part1 PATCH v5 18/22] x86, mm, numa: Add early_initmem

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Date:	Thu, 13 Jun 2013 21:03:05 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	mgorman@...e.de, minchan@...nel.org, mina86@...a86.com,
	gong.chen@...ux.intel.com, vasilis.liaskovitis@...fitbricks.com,
	lwoodman@...hat.com, riel@...hat.com, jweiner@...hat.com,
	prarit@...hat.com
Cc:	x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Pekka Enberg <penberg@...nel.org>,
	Jacob Shin <jacob.shin@....com>
Subject: [Part1 PATCH v5 18/22] x86, mm, numa: Add early_initmem_init() stub

From: Yinghai Lu <yinghai@...nel.org>

Introduce early_initmem_init() to call early_x86_numa_init(),
which will be used to parse numa info earlier.

Later will call init_mem_mapping for all the nodes.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Cc: Pekka Enberg <penberg@...nel.org>
Cc: Jacob Shin <jacob.shin@....com>
Reviewed-by: Tang Chen <tangchen@...fujitsu.com>
Tested-by: Tang Chen <tangchen@...fujitsu.com>
---
 arch/x86/include/asm/page_types.h |    1 +
 arch/x86/kernel/setup.c           |    1 +
 arch/x86/mm/init.c                |    6 ++++++
 arch/x86/mm/numa.c                |    7 +++++--
 4 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h
index b012b82..d04dd8c 100644
--- a/arch/x86/include/asm/page_types.h
+++ b/arch/x86/include/asm/page_types.h
@@ -55,6 +55,7 @@ bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
 extern unsigned long init_memory_mapping(unsigned long start,
 					 unsigned long end);
 
+void early_initmem_init(void);
 extern void initmem_init(void);
 
 #endif	/* !__ASSEMBLY__ */
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d11b1b7..301165e 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1162,6 +1162,7 @@ void __init setup_arch(char **cmdline_p)
 
 	early_acpi_boot_init();
 
+	early_initmem_init();
 	initmem_init();
 	memblock_find_dma_reserve();
 
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 8554656..3c21f16 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -467,6 +467,12 @@ void __init init_mem_mapping(void)
 	early_memtest(0, max_pfn_mapped << PAGE_SHIFT);
 }
 
+#ifndef CONFIG_NUMA
+void __init early_initmem_init(void)
+{
+}
+#endif
+
 /*
  * devmem_is_allowed() checks to see if /dev/mem access to a certain address
  * is valid. The argument is a physical page number.
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 630e09f..7d76936 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -665,13 +665,16 @@ static void __init early_x86_numa_init(void)
 	numa_init(dummy_numa_init);
 }
 
+void __init early_initmem_init(void)
+{
+	early_x86_numa_init();
+}
+
 void __init x86_numa_init(void)
 {
 	int i, nid;
 	struct numa_meminfo *mi = &numa_meminfo;
 
-	early_x86_numa_init();
-
 #ifdef CONFIG_ACPI_NUMA
 	if (srat_used)
 		x86_acpi_numa_init_slit();
-- 
1.7.1

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