[PATCH] setup_boot_APIC_clock() irq-enable fix
latest -git triggers an irqtrace/lockdep warning of a leaked
irqs-off condition:
BUG: at kernel/fork.c:1033 copy_process()
after some debugging it turns out that commit ca1b940c
accidentally left
interrupts disabled - which trickled down all the way to the first time
we fork a kernel thread and triggered the warning.
the fix is to re-enable interrupts in the 'else' branch of
setup_boot_APIC_clock()'s pmtimers calibration path.
Reported-by: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@brown.paperbag.linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
9c35dd7f8b
commit
4edc5db83f
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@ -506,7 +506,8 @@ void __init setup_boot_APIC_clock(void)
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apic_printk(APIC_VERBOSE, "... jiffies result ok\n");
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else
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local_apic_timer_verify_ok = 0;
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}
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} else
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local_irq_enable();
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if (!local_apic_timer_verify_ok) {
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printk(KERN_WARNING
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