memblock, x86: Make ARCH_DISCARD_MEMBLOCK a config option

From 6839454ae63f1eb21e515c10229ca95c22955fec Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Thu, 14 Jul 2011 11:22:17 +0200

Make ARCH_DISCARD_MEMBLOCK a config option so that it can be handled
together with other MEMBLOCK options.

Signed-off-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20110714094603.GH3455@htj.dyndns.org
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

5 files changed, 6 insertions, 4 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 97f08941dd79..28116d4f7b64 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -26,6 +26,7 @@ config X86
         select HAVE_KPROBES
         select HAVE_MEMBLOCK
         select HAVE_MEMBLOCK_NODE_MAP
+        select ARCH_DISCARD_MEMBLOCK
         select ARCH_WANT_OPTIONAL_GPIOLIB
         select ARCH_WANT_FRAME_POINTERS
         select HAVE_DMA_ATTRS
diff --git a/arch/x86/include/asm/memblock.h b/arch/x86/include/asm/memblock.h
index 17a882e90ada..bc5667081aea 100644
--- a/arch/x86/include/asm/memblock.h
+++ b/arch/x86/include/asm/memblock.h
@@ -1,8 +1,6 @@
 #ifndef _X86_MEMBLOCK_H
 #define _X86_MEMBLOCK_H
 
-#define ARCH_DISCARD_MEMBLOCK
-
 void memblock_x86_reserve_range(u64 start, u64 end, char *name);
 void memblock_x86_free_range(u64 start, u64 end);
 
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 31def584cceb..2491355bb6e4 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -197,7 +197,7 @@ static inline unsigned long memblock_region_reserved_end_pfn(const struct memblo
              region++)
 
 
-#ifdef ARCH_DISCARD_MEMBLOCK
+#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
 #define __init_memblock __meminit
 #define __initdata_memblock __meminitdata
 #else
diff --git a/mm/Kconfig b/mm/Kconfig
index 30a5d4792b83..7c5697116fcf 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -134,6 +134,9 @@ config HAVE_MEMBLOCK
 config HAVE_MEMBLOCK_NODE_MAP
         boolean
 
+config ARCH_DISCARD_MEMBLOCK
+        boolean
+
 # eventually, we can have this option just 'select SPARSEMEM'
 config MEMORY_HOTPLUG
         bool "Allow for memory hot-add"
diff --git a/mm/memblock.c b/mm/memblock.c
index c4a8750406fc..ebc6119f1280 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -959,7 +959,7 @@ static int __init early_memblock(char *p)
 }
 early_param("memblock", early_memblock);
 
-#if defined(CONFIG_DEBUG_FS) && !defined(ARCH_DISCARD_MEMBLOCK)
+#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK)
 
 static int memblock_debug_show(struct seq_file *m, void *private)
 {