linux-kernel - [PATCH 16/36] x86: move bios page reserve early to head32/64.c

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Date:	Wed, 20 Jan 2010 22:28:03 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Christoph Lameter <cl@...ux-foundation.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 16/36] x86: move bios page reserve early to head32/64.c

so prepare to make one more clean early_res.c

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 arch/x86/kernel/e820.c   |   22 ++--------------------
 arch/x86/kernel/head32.c |   12 ++++++++++++
 arch/x86/kernel/head64.c |    2 ++
 3 files changed, 16 insertions(+), 20 deletions(-)

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index bd6a361..b7681e3 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -735,29 +735,11 @@ struct early_res {
 	char name[15];
 	char overlap_ok;
 };
-static struct early_res early_res_x[MAX_EARLY_RES_X] __initdata = {
-	{ 0, PAGE_SIZE, "BIOS data page", 1 },	/* BIOS data page */
-#if defined(CONFIG_X86_32) && defined(CONFIG_X86_TRAMPOLINE)
-	/*
-	 * But first pinch a few for the stack/trampoline stuff
-	 * FIXME: Don't need the extra page at 4K, but need to fix
-	 * trampoline before removing it. (see the GDT stuff)
-	 */
-	{ PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE", 1 },
-#endif
-
-	{}
-};
+static struct early_res early_res_x[MAX_EARLY_RES_X] __initdata;
 
 static int max_early_res __initdata = MAX_EARLY_RES_X;
 static struct early_res *early_res __initdata = &early_res_x[0];
-static int early_res_count __initdata =
-#ifdef CONFIG_X86_32
-	2
-#else
-	1
-#endif
-	;
+static int early_res_count __initdata;
 
 static int __init find_overlapped_early(u64 start, u64 end)
 {
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index 5051b94..2e13544 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -29,6 +29,18 @@ static void __init i386_default_early_setup(void)
 
 void __init i386_start_kernel(void)
 {
+	reserve_early_overlap_ok(0, PAGE_SIZE, "BIOS data page");
+
+#ifdef CONFIG_X86_TRAMPOLINE
+	/*
+	 * But first pinch a few for the stack/trampoline stuff
+	 * FIXME: Don't need the extra page at 4K, but need to fix
+	 * trampoline before removing it. (see the GDT stuff)
+	 */
+	reserve_early_overlap_ok(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE,
+					 "EX TRAMPOLINE");
+#endif
+
 	reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
 
 #ifdef CONFIG_BLK_DEV_INITRD
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index b5a9896..452b7c4 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -98,6 +98,8 @@ void __init x86_64_start_reservations(char *real_mode_data)
 {
 	copy_bootdata(__va(real_mode_data));
 
+	reserve_early_overlap_ok(0, PAGE_SIZE, "BIOS data page");
+
 	reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
 
 #ifdef CONFIG_BLK_DEV_INITRD
-- 
1.6.4.2

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