linux-kernel - [tip: x86/boot] x86/head/64: Mark 'startup_gdt[]' and 'startup_gdt_descr' as _

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Date:   Mon, 16 Oct 2023 11:54:53 -0000
From:   "tip-bot2 for Hou Wenlong" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Hou Wenlong <houwenlong.hwl@...group.com>,
        Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/boot] x86/head/64: Mark 'startup_gdt[]' and
 'startup_gdt_descr' as __initdata

The following commit has been merged into the x86/boot branch of tip:

Commit-ID:     dc6283009016acd5a8c6a6c073506d82bbc55529
Gitweb:        https://git.kernel.org/tip/dc6283009016acd5a8c6a6c073506d82bbc55529
Author:        Hou Wenlong <houwenlong.hwl@...group.com>
AuthorDate:    Wed, 12 Jul 2023 11:30:05 +08:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Mon, 16 Oct 2023 13:38:24 +02:00

x86/head/64: Mark 'startup_gdt[]' and 'startup_gdt_descr' as __initdata

As 'startup_gdt[]' and 'startup_gdt_descr' are only used in booting,
mark them as __initdata to allow them to be freed after boot.

Signed-off-by: Hou Wenlong <houwenlong.hwl@...group.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/c85903a7cfad37d14a7e5a4df9fc7119a3669fb3.1689130310.git.houwenlong.hwl@antgroup.com
---
 arch/x86/kernel/head64.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index d6ca9c5..f41625d 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -69,7 +69,7 @@ EXPORT_SYMBOL(vmemmap_base);
 /*
  * GDT used on the boot CPU before switching to virtual addresses.
  */
-static struct desc_struct startup_gdt[GDT_ENTRIES] = {
+static struct desc_struct startup_gdt[GDT_ENTRIES] __initdata = {
 	[GDT_ENTRY_KERNEL32_CS]         = GDT_ENTRY_INIT(0xc09b, 0, 0xfffff),
 	[GDT_ENTRY_KERNEL_CS]           = GDT_ENTRY_INIT(0xa09b, 0, 0xfffff),
 	[GDT_ENTRY_KERNEL_DS]           = GDT_ENTRY_INIT(0xc093, 0, 0xfffff),
@@ -79,7 +79,7 @@ static struct desc_struct startup_gdt[GDT_ENTRIES] = {
  * Address needs to be set at runtime because it references the startup_gdt
  * while the kernel still uses a direct mapping.
  */
-static struct desc_ptr startup_gdt_descr = {
+static struct desc_ptr startup_gdt_descr __initdata = {
 	.size = sizeof(startup_gdt)-1,
 	.address = 0,
 };