diff options
| author | David Woodhouse <dwmw@amazon.co.uk> | 2024-12-05 18:05:09 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-12-06 12:41:58 +0300 |
| commit | 46d4e205e22c89841552b05663d34e57e9a66611 (patch) | |
| tree | 8cc392cee2f897c7e32b604269fde720eecfda57 | |
| parent | 207bdf7f72ae8b1764de294ae59bdf5b015082bd (diff) | |
| download | linux-46d4e205e22c89841552b05663d34e57e9a66611.tar.xz | |
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@amazon.co.uk>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Kai Huang <kai.huang@intel.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lore.kernel.org/r/20241205153343.3275139-4-dwmw2@infradead.org
| -rw-r--r-- | arch/x86/kernel/relocate_kernel_64.S | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/arch/x86/kernel/relocate_kernel_64.S b/arch/x86/kernel/relocate_kernel_64.S index 92478e2e254f..fea650f92606 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 |