[PATCH 6/8] lib/sort: Replace insertion sort in exception tables
From: Matt Mackall (mpm_at_selenic.com)
Date: 01/31/05
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Date: Mon, 31 Jan 2005 01:35:00 -0600 To: Andrew Morton <akpm@osdl.com>
Replace exception table insertion sort with lib/sort
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: mm2/lib/extable.c
===================================================================
--- mm2.orig/lib/extable.c 2005-01-30 20:33:18.000000000 -0800
+++ mm2/lib/extable.c 2005-01-30 20:40:53.000000000 -0800
@@ -13,6 +13,7 @@
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/sort.h>
#include <asm/uaccess.h>
extern struct exception_table_entry __start___ex_table[];
@@ -25,26 +26,17 @@
* This is used both for the kernel exception table and for
* the exception tables of modules that get loaded.
*/
+static int cmp_ex(const void *a, const void *b)
+{
+ const struct exception_table_entry *x = a, *y = b;
+ return x->insn - y->insn;
+}
+
void sort_extable(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;
- }
- }
+ sort(start, finish - start, sizeof(struct exception_table_entry),
+ cmp_ex, 0);
}
#endif
-
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