arm/ipipe: Fix IPIPE_TRAP_UNDEFINSTR reporting

Something moved the value of this constant but didn't update the
hard-coded instances. Fix this and avoid future problems by using the
proper symbolic value.

That just requires harding asm/ipipe_base.h for assembly use.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

arch/arm/include/asm/ipipe_base.h

@@ -23,10 +23,14 @@
 #ifndef __ASM_ARM_IPIPE_BASE_H
 #define __ASM_ARM_IPIPE_BASE_H
 
+#ifndef __ASSEMBLY__
 #include <asm-generic/ipipe.h>
+#endif
 
 #ifdef CONFIG_IPIPE
 
+#ifndef __ASSEMBLY__
+
 #ifdef CONFIG_SMP
 
 extern unsigned __ipipe_first_ipi;
@@ -72,6 +76,8 @@ unsigned __ipipe_processor_id(void);
 #define ipipe_processor_id()  (0)
 #endif /* !CONFIG_IPIPE */
 
+#endif /* !__ASSEMBLY__ */
+
 #define IPIPE_TRAP_MAYDAY        0	/* Internal recovery trap */
 
 /* ARM traps */

arch/arm/kernel/entry-armv.S

@@ -35,6 +35,7 @@
 #include "entry-header.S"
 #include <asm/entry-macro-multi.S>
 #include <asm/probes.h>
+#include <asm/ipipe_base.h>
 
 /*
  * Interrupt handling.
@@ -287,7 +288,7 @@ __und_svc:
 #endif
 
 #ifdef CONFIG_IPIPE
-	mov	r0, #7				@ r0 = IPIPE_TRAP_UNDEFINSTR
+	mov	r0, #IPIPE_TRAP_UNDEFINSTR
 	mov	r1, sp				@ r1 = &regs
 	bl	__ipipe_notify_trap		@ branch to trap handler
 	cmp	r0, #0
@@ -515,7 +516,7 @@ __und_usr:
 	usr_entry uaccess=0
 
 #ifdef CONFIG_IPIPE
-	mov	r0, #7				@ r0 = IPIPE_TRAP_UNDEFINSTR
+	mov	r0, #IPIPE_TRAP_UNDEFINSTR
 	mov	r1, sp				@ r1 = &regs
 	bl	__ipipe_notify_trap		@ branch to trap handler
 	cmp	r0, #0