[xtensa-cvscommit] linux/arch/xtensa/mm extable.c,1.1.1.1,1.2

[<joe...@us...>]

Update of /cvsroot/xtensa/linux/arch/xtensa/mm
In directory sc8-pr-cvs1:/tmp/cvs-serv10730/arch/xtensa/mm

Modified Files:
	extable.c 
Log Message:
We need to sort the exception table, else a task error crashes the kernel.


Index: extable.c
===================================================================
RCS file: /cvsroot/xtensa/linux/arch/xtensa/mm/extable.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** extable.c	28 Aug 2002 16:10:14 -0000	1.1.1.1
--- extable.c	12 Jun 2003 23:43:53 -0000	1.2
***************
*** 10,13 ****
--- 10,46 ----
  extern const struct exception_table_entry __stop___ex_table[];
  
+ /*
+  * The exception table needs to be sorted because we use the macros
+  * which put things into the exception table in a variety of segments.
+  */
+ static inline void
+ sort_ex_table(struct exception_table_entry *start,
+ 	      struct exception_table_entry *finish)
+ {
+ 	struct exception_table_entry el, *p, *q;
+ 
+ 	/* insertion sort */
+ 	for (p = start + 1; p < finish; ++p) {
+ 		/* start .. p-1 is sorted */
+ 		if (p[0].insn < p[-1].insn) {
+ 			/* move element p down to its right place */
+ 			el = *p;
+ 			q = p;
+ 			do {
+ 				/* el comes before q[-1], move q[-1] up one */
+ 				q[0] = q[-1];
+ 				--q;
+ 			} while (q > start && el.insn < q[-1].insn);
+ 			*q = el;
+ 		}
+ 	}
+ }
+ 
+ void
+ sort_exception_table(void)
+ {
+ 	sort_ex_table(__start___ex_table, __stop___ex_table);
+ }
+ 
  static inline unsigned long
  search_one_table(const struct exception_table_entry *first,