openrisc: switch to generic extable.h

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/openrisc/include/asm/Kbuild

@@ -16,6 +16,7 @@ generic-y += dma.h
 generic-y += emergency-restart.h
 generic-y += errno.h
 generic-y += exec.h
+generic-y += extable.h
 generic-y += fb.h
 generic-y += fcntl.h
 generic-y += ftrace.h

arch/openrisc/include/asm/uaccess.h

@@ -25,6 +25,7 @@
 #include <linux/prefetch.h>
 #include <linux/string.h>
 #include <asm/page.h>
+#include <asm/extable.h>
 
 /*
  * The fs value determines whether argument validity checking should be
@@ -60,23 +61,6 @@
 #define access_ok(type, addr, size) \
 	__range_ok((unsigned long)addr, (unsigned long)size)
 
-/*
- * The exception table consists of pairs of addresses: the first is the
- * address of an instruction that is allowed to fault, and the second is
- * the address at which the program should continue.  No registers are
- * modified, so it is entirely up to the continuation code to figure out
- * what to do.
- *
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path.  This means when everything is well,
- * we don't even have to jump over them.  Further, they do not intrude
- * on our cache or tlb entries.
- */
-
-struct exception_table_entry {
-	unsigned long insn, fixup;
-};
-
 /*
  * These are the main single-value transfer routines.  They automatically
  * use the right size if we just have the right pointer type.