linux-kernel - [tip: x86/cc] x86/relocate_kernel: Use named labels for less confusion

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Date: Tue, 18 Jun 2024 14:01:42 -0000
From: "tip-bot2 for Borislav Petkov" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Borislav Petkov (AMD)" <bp@...en8.de>,
 "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject:
 [tip: x86/cc] x86/relocate_kernel: Use named labels for less confusion

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

Commit-ID:     7b46a8997db27ed70b01458fa4437ec2360feddd
Gitweb:        https://git.kernel.org/tip/7b46a8997db27ed70b01458fa4437ec2360feddd
Author:        Borislav Petkov <bp@...en8.de>
AuthorDate:    Fri, 14 Jun 2024 12:58:50 +03:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Mon, 17 Jun 2024 17:45:46 +02:00

x86/relocate_kernel: Use named labels for less confusion

That identity_mapped() function was loving that "1" label to the point of
completely confusing its readers.

Use named labels in each place for clarity.

No functional changes.

Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Link: https://lore.kernel.org/r/20240614095904.1345461-6-kirill.shutemov@linux.intel.com
---
 arch/x86/kernel/relocate_kernel_64.S | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kernel/relocate_kernel_64.S b/arch/x86/kernel/relocate_kernel_64.S
index 54e6200..8b8922d 100644
--- a/arch/x86/kernel/relocate_kernel_64.S
+++ b/arch/x86/kernel/relocate_kernel_64.S
@@ -148,9 +148,10 @@ SYM_CODE_START_LOCAL_NOALIGN(identity_mapped)
 	 */
 	movl	$X86_CR4_PAE, %eax
 	testq	$X86_CR4_LA57, %r13
-	jz	1f
+	jz	.Lno_la57
 	orl	$X86_CR4_LA57, %eax
-1:
+.Lno_la57:
+
 	movq	%rax, %cr4
 
 	/* Flush the TLB (needed?) */
@@ -162,9 +163,9 @@ SYM_CODE_START_LOCAL_NOALIGN(identity_mapped)
 	 * used by kexec. Flush the caches before copying the kernel.
 	 */
 	testq	%r12, %r12
-	jz 1f
+	jz .Lsme_off
 	wbinvd
-1:
+.Lsme_off:
 
 	movq	%rcx, %r11
 	call	swap_pages
@@ -184,7 +185,7 @@ SYM_CODE_START_LOCAL_NOALIGN(identity_mapped)
 	 */
 
 	testq	%r11, %r11
-	jnz 1f
+	jnz .Lrelocate
 	xorl	%eax, %eax
 	xorl	%ebx, %ebx
 	xorl    %ecx, %ecx
@@ -205,7 +206,7 @@ SYM_CODE_START_LOCAL_NOALIGN(identity_mapped)
 	ret
 	int3
 
-1:
+.Lrelocate:
 	popq	%rdx
 	leaq	PAGE_SIZE(%r10), %rsp
 	ANNOTATE_RETPOLINE_SAFE