riscv: use asm-generic/extable.h

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>

arch/riscv/include/asm/Kbuild

@@ -4,6 +4,7 @@ generic-y += compat.h
 generic-y += cputime.h
 generic-y += device.h
 generic-y += div64.h
+generic-y += extable.h
 generic-y += dma.h
 generic-y += dma-contiguous.h
 generic-y += dma-mapping.h

arch/riscv/include/asm/uaccess.h

@@ -23,6 +23,7 @@
 #include <linux/compiler.h>
 #include <linux/thread_info.h>
 #include <asm/byteorder.h>
+#include <asm/extable.h>
 #include <asm/asm.h>
 
 #define __enable_user_access()							\
@@ -98,12 +99,6 @@ static inline int __access_ok(unsigned long addr, unsigned long size)
  * on our cache or tlb entries.
  */
 
-struct exception_table_entry {
-	unsigned long insn, fixup;
-};
-
-extern int fixup_exception(struct pt_regs *state);
-
 #if defined(__LITTLE_ENDIAN)
 #define __MSW	1
 #define __LSW	0