use kernel abs(), remove recursion in gcd() (closes: #2307)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8608 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ar7-2.6/files/arch/mips/ar7/clock.c b/target/linux/ar7-2.6/files/arch/mips/ar7/clock.c
index f51c641..c7ae09e 100644 (file)
--- a/target/linux/ar7-2.6/files/arch/mips/ar7/clock.c
+++ b/target/linux/ar7-2.6/files/arch/mips/ar7/clock.c
@@ -99,16 +99,20 @@ EXPORT_SYMBOL(ar7_bus_clock);
 int ar7_dsp_clock = 0;
 EXPORT_SYMBOL(ar7_dsp_clock);
 
-static int gcd(int x, int y)
+static int gcd(int a, int b)
 {
-       if (x > y)
-               return (x % y) ? gcd(y, x % y) : y;
-       return (y % x) ? gcd(x, y % x) : x;
-}
+       int c;
 
-static inline int ABS(int x)
-{
-       return (x >= 0) ? x : -x;
+       if ( a < b) {
+               c = a;
+               a = b;
+               b = c;
+       }
+       while (c = (a % b)) {
+               a = b;
+               b = c;
+       }
+       return b;
 }
 
 static void approximate(int base, int target, int *prediv,
@@ -118,7 +122,7 @@ static void approximate(int base, int target, int *prediv,
        for (i = 1; i <= 16; i++) {
                for (j = 1; j <= 32; j++) {
                        for (k = 1; k <= 32; k++) {
-                               freq = ABS(base / j * i / k - target);
+                               freq = abs(base / j * i / k - target);
                                if (freq < res) {
                                        res = freq;
                                        *mul = i;