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Date: Thu, 29 Oct 2009 22:59:01 +0100
From: Helge Deller <deller@gmx.de>
To: linux-parisc@vger.kernel.org, Kyle McMartin <kyle@mcmartin.ca>,
	Randolph Chung <randolph@tausq.org>
Subject: [PATCH] parisc: use sort() instead of home-made implementation
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diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index 69dad5a..e5a4390 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -13,6 +13,7 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/kallsyms.h>
+#include <linux/sort.h>
 
 #include <asm/uaccess.h>
 #include <asm/assembly.h>
@@ -115,24 +116,21 @@ unwind_table_init(struct unwind_table *table, const char *name,
 	}
 }
 
+static int cmp_unwind_table_entry(const void *a, const void *b)
+{
+	return ((const struct unwind_table_entry *)a)->region_start
+	     - ((const struct unwind_table_entry *)b)->region_start;
+}
+
 static void
 unwind_table_sort(struct unwind_table_entry *start,
 		  struct unwind_table_entry *finish)
 {
-	struct unwind_table_entry el, *p, *q;
-
-	for (p = start + 1; p < finish; ++p) {
-		if (p[0].region_start < p[-1].region_start) {
-			el = *p;
-			q = p;
-			do {
-				q[0] = q[-1];
-				--q;
-			} while (q > start && 
-				 el.region_start < q[-1].region_start);
-			*q = el;
-		}
-	}
+	int len;
+
+	len  = (finish - start) / sizeof(struct unwind_table_entry);
+	sort(start, len, sizeof(struct unwind_table_entry),
+	     cmp_unwind_table_entry, NULL);
 }
 
 struct unwind_table *