linux-kernel - [PATCH] x86/setup: Make relocated_ramdisk a local variable of relocate

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Date:   Mon, 13 Nov 2023 11:40:26 +0800
From:   Yuntao Wang <ytcoode@...il.com>
To:     x86@...nel.org, linux-kernel@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Juergen Gross <jgross@...e.com>, Baoquan He <bhe@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Saurabh Sengar <ssengar@...ux.microsoft.com>,
        Yuntao Wang <ytcoode@...il.com>
Subject: [PATCH] x86/setup: Make relocated_ramdisk a local variable of relocate_initrd()

After commit 0b62f6cb0773 ("x86/microcode/32: Move early loading after
paging enable"), the global variable relocated_ramdisk is no longer used
anywhere except for the relocate_initrd() function. Make it a local
variable of that function.

Signed-off-by: Yuntao Wang <ytcoode@...il.com>
---
 arch/x86/include/asm/setup.h | 2 --
 arch/x86/kernel/setup.c      | 4 +---
 2 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index bf483fcb4e57..5c83729c8e71 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -31,8 +31,6 @@
 #include <asm/bootparam.h>
 #include <asm/x86_init.h>
 
-extern u64 relocated_ramdisk;
-
 /* Interrupt control for vSMPowered x86_64 systems */
 #ifdef CONFIG_X86_64
 void vsmp_init(void);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 1526747bedf2..ec2c21a1844e 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -226,8 +226,6 @@ static void __init reserve_brk(void)
 	_brk_start = 0;
 }
 
-u64 relocated_ramdisk;
-
 #ifdef CONFIG_BLK_DEV_INITRD
 
 static u64 __init get_ramdisk_image(void)
@@ -261,7 +259,7 @@ static void __init relocate_initrd(void)
 	u64 area_size     = PAGE_ALIGN(ramdisk_size);
 
 	/* We need to move the initrd down into directly mapped mem */
-	relocated_ramdisk = memblock_phys_alloc_range(area_size, PAGE_SIZE, 0,
+	u64 relocated_ramdisk = memblock_phys_alloc_range(area_size, PAGE_SIZE, 0,
 						      PFN_PHYS(max_pfn_mapped));
 	if (!relocated_ramdisk)
 		panic("Cannot find place for new RAMDISK of size %lld\n",
-- 
2.42.1