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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched

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* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
  sched: enable early use of sched_clock()
  lockdep: make cli/sti annotation warnings clearer
This commit is contained in:
Linus Torvalds 2007-12-07 11:00:46 -08:00
parent e17587b5b9 8ced5f69e4
commit fa2dd441df
2 changed files with 15 additions and 5 deletions
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13
kernel/lockdep.c
View file

@ -2654,10 +2654,15 @@ static void check_flags(unsigned long flags)
if (!debug_locks)
return;
if (irqs_disabled_flags(flags))
DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled);
else
DEBUG_LOCKS_WARN_ON(!current->hardirqs_enabled);
if (irqs_disabled_flags(flags)) {
if (DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)) {
printk("possible reason: unannotated irqs-off.\n");
}
} else {
if (DEBUG_LOCKS_WARN_ON(!current->hardirqs_enabled)) {
printk("possible reason: unannotated irqs-on.\n");
}
}
/*
* We dont accurately track softirq state in e.g.

7
kernel/sched.c
View file

@ -488,7 +488,12 @@ unsigned long long cpu_clock(int cpu)
local_irq_save(flags);
rq = cpu_rq(cpu);
update_rq_clock(rq);
/*
* Only call sched_clock() if the scheduler has already been
* initialized (some code might call cpu_clock() very early):
*/
if (rq->idle)
update_rq_clock(rq);
now = rq->clock;
local_irq_restore(flags);