s390/extable: move extable related functions to mm/extable.c

Just like arm64, riscv, and x86 move extable related functions to
mm/extable.c. This is currently only one function, but this will
change with subsequent changes.
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

arch/s390/mm/Makefile

@@ -4,7 +4,7 @@
 #
 
 obj-y		:= init.o fault.o extmem.o mmap.o vmem.o maccess.o
-obj-y		+= page-states.o pageattr.o pgtable.o pgalloc.o
+obj-y		+= page-states.o pageattr.o pgtable.o pgalloc.o extable.o
 
 obj-$(CONFIG_CMM)		+= cmm.o
 obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o

arch/s390/mm/extable.c

+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/extable.h>
+#include <asm/extable.h>
+
+const struct exception_table_entry *s390_search_extables(unsigned long addr)
+{
+	const struct exception_table_entry *fixup;
+	size_t num;
+
+	fixup = search_exception_tables(addr);
+	if (fixup)
+		return fixup;
+	num = __stop_amode31_ex_table - __start_amode31_ex_table;
+	return search_extable(__start_amode31_ex_table, num, addr);
+}

arch/s390/mm/fault.c

@@ -228,18 +228,6 @@ static noinline void do_sigsegv(struct pt_regs *regs, int si_code)
 			(void __user *)(regs->int_parm_long & __FAIL_ADDR_MASK));
 }
 
-const struct exception_table_entry *s390_search_extables(unsigned long addr)
-{
-	const struct exception_table_entry *fixup;
-	size_t num;
-
-	fixup = search_exception_tables(addr);
-	if (fixup)
-		return fixup;
-	num = __stop_amode31_ex_table - __start_amode31_ex_table;
-	return search_extable(__start_amode31_ex_table, num, addr);
-}
-
 static noinline void do_no_context(struct pt_regs *regs)
 {
 	const struct exception_table_entry *fixup;