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x86/kexec: Fix a comment of swap_pages() assembly

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When relocate_kernel() gets called, %rdi holds 'indirection_page' and
%rsi holds 'page_list'.  And %rdi always holds 'indirection_page' when
swap_pages() is called.

Therefore the comment of the first line code of swap_pages()

	movq    %rdi, %rcx      /* Put the page_list in %rcx */

.. isn't correct because it actually moves the 'indirection_page' to
the %rcx.  Fix it.

Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: https://lore.kernel.org/all/adafdfb1421c88efce04420fc9a996c0e2ca1b34.1724573384.git.kai.huang@intel.com
This commit is contained in:
Kai Huang
2024-08-25 20:18:05 +12:00
committed by Thomas Gleixner
parent c6e6a3c169
commit 3c41ad39f1
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/relocate_kernel_64.S
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@@ -258,7 +258,7 @@ SYM_CODE_END(virtual_mapped)
/* Do the copies */
SYM_CODE_START_LOCAL_NOALIGN(swap_pages)
UNWIND_HINT_END_OF_STACK
movq %rdi, %rcx /* Put the page_list in %rcx */
movq %rdi, %rcx /* Put the indirection_page in %rcx */
xorl %edi, %edi
xorl %esi, %esi
jmp 1f