Re: 2.6.17-rt1 unknown symbol monotonic_clock

[John Rigg <lk@sound-man.co.uk>]

On Wed, Jun 21, 2006 at 01:06:13PM +0200, Ingo Molnar wrote:
> 
> * John Rigg <lk@sound-man.co.uk> wrote:
> 
> > Just compiled 2.6.17-rt1 on x86_64 UP system and got the following
> > message when doing `make modules_install':
> > WARNING: /lib/modules/2.6.17-rt1/kernel/drivers/char/hangcheck-timer.ko \
> > needs unknown symbol monotonic_clock
> 
> please try -rt2 - does it work any better?

I'd try it if I could find it :)

In the meantime I tried the patch below (don't know if it's correct but it works
so far).

John

____________________________________________________________________

diff -uprN linux-2.6.17.orig/arch/x86_64/kernel/time.c linux-2.6.17/arch/x86_64/kernel/time.c
--- linux-2.6.17.orig/arch/x86_64/kernel/time.c	2006-06-21 14:29:09.000000000 +0100
+++ linux-2.6.17/arch/x86_64/kernel/time.c	2006-06-21 14:30:56.000000000 +0100
@@ -247,6 +247,15 @@ unsigned long long sched_clock(void)
 	return cycles_2_ns(a);
 }
 
+/*
+ * Monotonic_clock - returns # of nanoseconds passed since time_init()
+ */
+unsigned long long monotonic_clock(void)
+{
+	return sched_clock();
+}
+EXPORT_SYMBOL(monotonic_clock);
+
 static int tsc_unstable;
 
 static inline int check_tsc_unstable(void)