Commit 31498a01 authored Oct 31, 2008 by Huang Ying Committed by Ingo Molnar Oct 31, 2008

kexec/i386: remove PAGE_SIZE alignment from relocate_kernel



Impact: save kernel .text by loosening kexec page alignment

This patch removes PAGE_SIZE alignment from relocate_kernel(). Before
kexec jump patches are merged, control page is mapped to
relocate_kernel in kexec page tables, so relocate_kernel must be
PAGE_SIZE aligned. Now, control page is mapped to identity mapped
address, so relocate_kernel need not to be PAGE_SIZE aligned any
more. This can reduce a few KB from kernel text segement.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 721d5dfe

arch/x86/kernel/relocate_kernel_32.S

+0 −1

Original line number	Diff line number	Diff line
		@@ -39,7 +39,6 @@
		#define CP_PA_BACKUP_PAGES_MAP DATA(0x1c)

		.text
		.align PAGE_SIZE
		.globl relocate_kernel
		relocate_kernel:
		/* Save the CPU context, used for jumping back */