[tip: x86/boot] x86/kexec: Use named labels in swap_pages in relocate_kernel_64.S

[tip-bot2 for David Woodhouse]

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

Commit-ID:     46d4e205e22c89841552b05663d34e57e9a66611
Gitweb:        https://git.kernel.org/tip/46d4e205e22c89841552b05663d34e57e9a66611
Author:        David Woodhouse <dwmw@xxxxxxxxxxxx>
AuthorDate:    Thu, 05 Dec 2024 15:05:09 
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Fri, 06 Dec 2024 10:41:58 +01:00

x86/kexec: Use named labels in swap_pages in relocate_kernel_64.S

Make the code a little more readable.

Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Acked-by: Kai Huang <kai.huang@xxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Cc: Dave Young <dyoung@xxxxxxxxxx>
Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Link: https://lore.kernel.org/r/20241205153343.3275139-4-dwmw2@xxxxxxxxxxxxx
---
 arch/x86/kernel/relocate_kernel_64.S | 30 +++++++++++++--------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/arch/x86/kernel/relocate_kernel_64.S b/arch/x86/kernel/relocate_kernel_64.S
index 92478e2..fea650f 100644
--- a/arch/x86/kernel/relocate_kernel_64.S
+++ b/arch/x86/kernel/relocate_kernel_64.S
@@ -279,31 +279,31 @@ SYM_CODE_START_LOCAL_NOALIGN(swap_pages)
 	movq	%rdi, %rcx	/* Put the indirection_page in %rcx */
 	xorl	%edi, %edi
 	xorl	%esi, %esi
-	jmp	1f
+	jmp	.Lstart		/* Should start with an indirection record */
 
-0:	/* top, read another word for the indirection page */
+.Lloop:	/* top, read another word for the indirection page */
 
 	movq	(%rbx), %rcx
 	addq	$8,	%rbx
-1:
+.Lstart:
 	testb	$0x1,	%cl   /* is it a destination page? */
-	jz	2f
+	jz	.Lnotdest
 	movq	%rcx,	%rdi
 	andq	$0xfffffffffffff000, %rdi
-	jmp	0b
-2:
+	jmp	.Lloop
+.Lnotdest:
 	testb	$0x2,	%cl   /* is it an indirection page? */
-	jz	2f
+	jz	.Lnotind
 	movq	%rcx,   %rbx
 	andq	$0xfffffffffffff000, %rbx
-	jmp	0b
-2:
+	jmp	.Lloop
+.Lnotind:
 	testb	$0x4,	%cl   /* is it the done indicator? */
-	jz	2f
-	jmp	3f
-2:
+	jz	.Lnotdone
+	jmp	.Ldone
+.Lnotdone:
 	testb	$0x8,	%cl   /* is it the source indicator? */
-	jz	0b	      /* Ignore it otherwise */
+	jz	.Lloop	      /* Ignore it otherwise */
 	movq	%rcx,   %rsi  /* For ever source page do a copy */
 	andq	$0xfffffffffffff000, %rsi
 
@@ -328,8 +328,8 @@ SYM_CODE_START_LOCAL_NOALIGN(swap_pages)
 	rep ; movsq
 
 	lea	PAGE_SIZE(%rax), %rsi
-	jmp	0b
-3:
+	jmp	.Lloop
+.Ldone:
 	ANNOTATE_UNRET_SAFE
 	ret
 	int3