Commit e97126cd authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[ARM] Provide basic printk_clock() implementation

Current sched_clock() implementations on ARM cause unbootable kernels
with PRINTK_TIME support enabled.  To avoid this, provide a basic
printk_clock() implementation which avoids sched_clock() being called
before the page tables have been set up.
Signed-off-by: default avatarRussell King <>
parent 6020dff0
......@@ -87,6 +87,17 @@ unsigned long long __attribute__((weak)) sched_clock(void)
return (unsigned long long)jiffies * (1000000000 / HZ);
* An implementation of printk_clock() independent from
* sched_clock(). This avoids non-bootable kernels when
* printk_clock is enabled.
unsigned long long printk_clock(void)
return (unsigned long long)(jiffies - INITIAL_JIFFIES) *
(1000000000 / HZ);
static unsigned long next_rtc_update;
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