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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2009-08-14 15:47:25 +0200
committerThomas Gleixner <tglx@linutronix.de>2009-08-15 10:55:46 +0200
commitc55c87c892c1875deace0c8fc28787335277fdf2 (patch)
tree8b3a4c08f0eea40683cfb94bc44ef18507ae3011 /include/linux/clocksource.h
parentfb63a0ebe615fba9de8c75ea44ded999d1e24c65 (diff)
clocksource: Move watchdog downgrade to a work queue thread
Move the downgrade of an unstable clocksource from the timer interrupt context into the process context of a work queue thread. This is needed to be able to do the clocksource switch with stop_machine. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: John Stultz <johnstul@us.ibm.com> Cc: Daniel Walker <dwalker@fifo99.com> LKML-Reference: <20090814134809.354926067@de.ibm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/clocksource.h')
-rw-r--r--include/linux/clocksource.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index f263b3abf46..19ad43af62d 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -213,6 +213,7 @@ extern struct clocksource *clock; /* current clocksource */
#define CLOCK_SOURCE_WATCHDOG 0x10
#define CLOCK_SOURCE_VALID_FOR_HRES 0x20
+#define CLOCK_SOURCE_UNSTABLE 0x40
/* simplify initialization of mask field */
#define CLOCKSOURCE_MASK(bits) (cycle_t)((bits) < 64 ? ((1ULL<<(bits))-1) : -1)