Hi,
The HZ constant has changed in 2.5 and udelay doesn't work
properly anymore. Here's a patch to fix it. I checked the first multiply
is still optimized out during compilation if the delay is constant. It's
for mips64, but mips32 needs it as well.
Vivien.
--- include/asm-mips64/delay.h 2002-12-11 20:44:20.000000000 +0100
+++ include/asm-mips64/delay.h 2002-12-21 18:48:12.000000000 +0100
@@ -41,11 +41,10 @@
{
unsigned long lo;
-#if (HZ == 100)
- usecs *= 0x00068db8bac710cbUL; /* 2**64 / (1000000 / HZ) */
-#elif (HZ == 128)
- usecs *= 0x0008637bd05af6c6UL; /* 2**64 / (1000000 / HZ) */
-#endif
+/* HZ * 2**64 / 1000000 */
+#define __UDELAY_FIXED64_HZ_1000000 (0x8000000000000000UL / (500000 / HZ))
+
+ usecs *= __UDELAY_FIXED64_HZ_1000000;
__asm__("dmultu\t%2,%3"
:"=h" (usecs), "=l" (lo)
:"r" (usecs),"r" (lpj));
