x86/boot/compressed/64: Use LEA to initialize boot stack pointer

It's shorter, and it's what is used in every other place, so make it
consistent.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200107194436.2166846-2-nivedita@alum.mit.edu

diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 1f1f6c8..d1220de 100644 (file)
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -81,9 +81,7 @@ SYM_FUNC_START(startup_32)
        subl    $1b, %ebp
 
 /* setup a stack and make sure cpu supports long mode. */
-       movl    $boot_stack_end, %eax
-       addl    %ebp, %eax
-       movl    %eax, %esp
+       leal    boot_stack_end(%ebp), %esp
 
        call    verify_cpu
        testl   %eax, %eax