Messages in this thread | | | Date | Thu, 1 Sep 2011 11:59:18 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH V2 1/1] lib/atomic64 using raw_spin_lock_irq[save|resotre] for atomicity |
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On Thu, 1 Sep 2011, Shan Hai wrote:
> The spin_lock_irq[save|restore] could break the atomicity of the > atomic64_* operations in the PREEMPT-RT configuration, because > the spin_lock_irq[save|restore] themselves are preemptable in the > PREEMPT-RT, using raw variant of the spin lock could provide the > atomicity that atomic64_* need.
Good catch. Queued for the next release.
Thanks,
tglx
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