From 01363220f5d23ef68276db8974e46a502e43d01d Mon Sep 17 00:00:00 2001
From: Kyle McMartin <kyle@mako.i.cabal.ca>
Date: Mon, 26 Feb 2007 22:21:22 -0500
Subject: [PATCH] [PARISC] clocksource: Move update_cr16_clocksource later in
boot
smp_cpus_done is too early for us... before we even do a device
inventory! Move update_cr16_clocksource into the tail end of
processor_probe() and stub it out on CONFIG_SMP=n builds.
Verified that clocksource0 is properly updated to use jiffies
on an SMP build.
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
---
arch/parisc/kernel/processor.c | 8 ++++++++
arch/parisc/kernel/smp.c | 4 ----
arch/parisc/kernel/time.c | 5 +++++
3 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index 7c056dcebf553..dd5d0cb6b3473 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -48,6 +48,8 @@ EXPORT_SYMBOL(boot_cpu_data);
struct cpuinfo_parisc cpu_data[NR_CPUS] __read_mostly;
+extern int update_cr16_clocksource(void); /* from time.c */
+
/*
** PARISC CPU driver - claim "device" and initialize CPU data structures.
**
@@ -198,6 +200,12 @@ static int __init processor_probe(struct parisc_device *dev)
}
#endif
+ /* If we've registered more than one cpu,
+ * we'll use the jiffies clocksource since cr16
+ * is not synchronized between CPUs.
+ */
+ update_cr16_clocksource();
+
return 0;
}
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index bb6e6a38e9119..6ba9257fdb7f1 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -567,10 +567,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
void smp_cpus_done(unsigned int cpu_max)
{
- extern int update_cr16_clocksource(void);
-
- update_cr16_clocksource();
-
return;
}
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 9b14066d693c2..07a991aa9b0c2 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -200,6 +200,11 @@ int update_cr16_clocksource(void)
return change;
}
+#else
+int update_cr16_clocksource(void)
+{
+ return 0; /* no change */
+}
#endif /*CONFIG_SMP*/
void __init start_cpu_itimer(void)
--
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