Commit aaf5eefd authored by Juergen Gross's avatar Juergen Gross
Browse files

x86/xen: remove unneeded dummy push from xen_hypercall_hvm() 



Stack alignment of the kernel in 64-bit mode is 8, not 16, so the
dummy push in xen_hypercall_hvm() for aligning the stack to 16 bytes
can be removed.

Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
Reviewed-by: default avatarJan Beulich <jbeulich@suse.com>
Reviewed-by: default avatarAndrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
parent 0bd797b8

arch/x86/xen/xen-head.S

+0 −6
Original line number Diff line number Diff line
@@ -100,9 +100,6 @@ SYM_FUNC_START(xen_hypercall_hvm) 
	push %r10

	push %r9

	push %r8

#ifdef CONFIG_FRAME_POINTER

	pushq $0	/* Dummy push for stack alignment. */

#endif

#endif

	/* Set the vendor specific function. */

	call __xen_hypercall_setfunc
@@ -119,9 +116,6 @@ SYM_FUNC_START(xen_hypercall_hvm) 
#else

	lea xen_hypercall_amd(%rip), %rcx

	cmp %rax, %rcx

#ifdef CONFIG_FRAME_POINTER

	pop %rax	/* Dummy pop. */

#endif

	pop %r8

	pop %r9

	pop %r10