[PATCH v3 7/8] PPC: switch entry point annotations to common model

[Jan Beulich <jbeulich@xxxxxxxx>]

Use the generic framework in xen/linkage.h. No change in generated code
except of course the converted symbol changes to be a hidden one.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v3: New.

--- a/xen/arch/ppc/include/asm/config.h
+++ b/xen/arch/ppc/include/asm/config.h
@@ -31,12 +31,7 @@
 
 /* Linkage for PPC */
 #ifdef __ASSEMBLY__
-#define ALIGN .p2align 2
-
-#define ENTRY(name)                                                            
\
-    .globl name;                                                               
\
-    ALIGN;                                                                     
\
-    name:
+#define CODE_ALIGN 4
 #endif
 
 #define XEN_VIRT_START _AT(UL, 0x400000)
--- a/xen/arch/ppc/ppc64/head.S
+++ b/xen/arch/ppc/ppc64/head.S
@@ -1,8 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
+#include <xen/linkage.h>
+
     .section .text.header, "ax", %progbits
 
-ENTRY(start)
+FUNC(start)
     /*
      * Depending on how we were booted, the CPU could be running in either
      * Little Endian or Big Endian mode. The following trampoline from Linux
@@ -25,6 +27,4 @@ ENTRY(start)
 
     /* Now that the endianness is confirmed, continue */
 1:  b 1b
-
-    .size start, . - start
-    .type start, %function
+END(start)