linux-kernel - [tip:x86/mm2] x86: Merge early kernel reserve for 32bit and 64bit

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Message-ID: <tip-37e2fc42c2164c785261e83ea2f21fbeb7c46638@git.kernel.org>
Date:	Tue, 29 Jan 2013 17:52:35 -0800
From:	tip-bot for Yinghai Lu <yinghai@...nel.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	yinghai@...nel.org, alexander.h.duyck@...el.com,
	tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/mm2] x86: Merge early kernel reserve for 32bit and 64bit

Commit-ID:  37e2fc42c2164c785261e83ea2f21fbeb7c46638
Gitweb:     http://git.kernel.org/tip/37e2fc42c2164c785261e83ea2f21fbeb7c46638
Author:     Yinghai Lu <yinghai@...nel.org>
AuthorDate: Thu, 24 Jan 2013 12:20:12 -0800
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Tue, 29 Jan 2013 15:33:07 -0800

x86: Merge early kernel reserve for 32bit and 64bit

They are the same, and we could move them out from head32/64.c to setup.c.

We are using memblock, and it could handle overlapping properly, so
we don't need to reserve some at first to hold the location, and just
need to make sure we reserve them before we are using memblock to find
free mem to use.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-32-git-send-email-yinghai@kernel.org
Cc: Alexander Duyck <alexander.h.duyck@...el.com>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/kernel/head32.c | 9 ---------
 arch/x86/kernel/head64.c | 9 ---------
 arch/x86/kernel/setup.c  | 9 +++++++++
 3 files changed, 9 insertions(+), 18 deletions(-)

diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index a795b54..138463a 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -33,9 +33,6 @@ void __init i386_start_kernel(void)
 {
 	sanitize_boot_params(&boot_params);
 
-	memblock_reserve(__pa_symbol(&_text),
-			 __pa_symbol(&__bss_stop) - __pa_symbol(&_text));
-
 	/* Call the subarch specific early setup function */
 	switch (boot_params.hdr.hardware_subarch) {
 	case X86_SUBARCH_MRST:
@@ -49,11 +46,5 @@ void __init i386_start_kernel(void)
 		break;
 	}
 
-	/*
-	 * At this point everything still needed from the boot loader
-	 * or BIOS or kernel text should be early reserved or marked not
-	 * RAM in e820. All other memory is free game.
-	 */
-
 	start_kernel();
 }
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 6873b07..57334f4 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -186,16 +186,7 @@ void __init x86_64_start_reservations(char *real_mode_data)
 	if (!boot_params.hdr.version)
 		copy_bootdata(__va(real_mode_data));
 
-	memblock_reserve(__pa_symbol(&_text),
-			 __pa_symbol(&__bss_stop) - __pa_symbol(&_text));
-
 	reserve_ebda_region();
 
-	/*
-	 * At this point everything still needed from the boot loader
-	 * or BIOS or kernel text should be early reserved or marked not
-	 * RAM in e820. All other memory is free game.
-	 */
-
 	start_kernel();
 }
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 5dc47c3..a74701a 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -805,8 +805,17 @@ early_param("reservelow", parse_reservelow);
 
 void __init setup_arch(char **cmdline_p)
 {
+	memblock_reserve(__pa_symbol(_text),
+			 (unsigned long)__bss_stop - (unsigned long)_text);
+
 	early_reserve_initrd();
 
+	/*
+	 * At this point everything still needed from the boot loader
+	 * or BIOS or kernel text should be early reserved or marked not
+	 * RAM in e820. All other memory is free game.
+	 */
+
 #ifdef CONFIG_X86_32
 	memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
 	visws_early_detect();
--
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