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Subject[patch V2 01/11] clocksource: Provide clocksource_arch_init()
Architectures have extra archdata in the clocksource, e.g. for VDSO
support. There are no sanity checks or general initializations for this
available. Add support for that.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
include/linux/clocksource.h | 5 +++++
kernel/time/Kconfig | 4 ++++
kernel/time/clocksource.c | 2 ++
3 files changed, 11 insertions(+)

--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -241,6 +241,11 @@ static inline void __clocksource_update_
__clocksource_update_freq_scale(cs, 1000, khz);
}

+#ifdef CONFIG_ARCH_CLOCKSOURCE_INIT
+extern void clocksource_arch_init(struct clocksource *cs);
+#else
+static inline void clocksource_arch_init(struct clocksource *cs) { }
+#endif

extern int timekeeping_notify(struct clocksource *clock);

--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -12,6 +12,10 @@ config CLOCKSOURCE_WATCHDOG
config ARCH_CLOCKSOURCE_DATA
bool

+# Architecture has extra clocksource init called from registration
+config ARCH_CLOCKSOURCE_INIT
+ bool
+
# Clocksources require validation of the clocksource against the last
# cycle update - x86/TSC misfeature
config CLOCKSOURCE_VALIDATE_LAST_CYCLE
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -937,6 +937,8 @@ int __clocksource_register_scale(struct
{
unsigned long flags;

+ clocksource_arch_init(cs);
+
/* Initialize mult/shift and max_idle_ns */
__clocksource_update_freq_scale(cs, scale, freq);


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