x86/asm: Replace WEAK uses by SYM_INNER_LABEL_ALIGN

Use the new SYM_INNER_LABEL_ALIGN for WEAK entries in the middle of x86
assembly functions.

And make sure WEAK is not defined for x86 anymore as these were the last
users.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191011115108.12392-29-jslaby@suse.cz

arch/x86/kernel/ftrace_32.S

@@ -85,7 +85,7 @@ ftrace_graph_call:
 #endif
 
 /* This is weak to keep gas from relaxing the jumps */
-WEAK(ftrace_stub)
+SYM_INNER_LABEL_ALIGN(ftrace_stub, SYM_L_WEAK)
 	ret
 SYM_CODE_END(ftrace_caller)
 

arch/x86/kernel/ftrace_64.S

@@ -168,7 +168,7 @@ SYM_INNER_LABEL(ftrace_graph_call, SYM_L_GLOBAL)
  * This is weak to keep gas from relaxing the jumps.
  * It is also used to copy the retq for trampolines.
  */
-WEAK(ftrace_stub)
+SYM_INNER_LABEL_ALIGN(ftrace_stub, SYM_L_WEAK)
 	retq
 SYM_FUNC_END(ftrace_caller)
 

arch/x86/kernel/head_32.S

@@ -156,7 +156,7 @@ SYM_CODE_START(startup_32)
 	jmp *%eax
 
 .Lbad_subarch:
-WEAK(xen_entry)
+SYM_INNER_LABEL_ALIGN(xen_entry, SYM_L_WEAK)
 	/* Unknown implementation; there's really
 	   nothing we can do at this point. */
 	ud2a

include/linux/linkage.h

@@ -121,13 +121,13 @@
 #endif /* CONFIG_X86 */
 #endif /* LINKER_SCRIPT */
 
+#ifndef CONFIG_X86
 #ifndef WEAK
 /* deprecated, use SYM_FUNC_START_WEAK* */
 #define WEAK(name)	   \
 	SYM_FUNC_START_WEAK(name)
 #endif
 
-#ifndef CONFIG_X86
 #ifndef END
 /* deprecated, use SYM_FUNC_END, SYM_DATA_END, or SYM_END */
 #define END(name) \