Messages in this thread | | | Date | Mon, 23 Sep 2002 23:03:40 +0530 | From | Dipankar Sarma <> | Subject | Re: 2.5.38-mm2 [PATCH] |
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On Mon, Sep 23, 2002 at 09:28:41AM -0700, Andrew Morton wrote: > #ifdef CONFIG_PREEMPTION > #define rcu_read_lock() preempt_disable() > #define rcu_read_unlock() preempt_enable() > #else > #define rcu_read_lock() do {} while(0) > #define rcu_read_unlock() do {} while(0) > #endif > > with > > #define rcu_read_lock() preempt_disable() > #define rcu_read_unlock() preempt_enable() > > because preempt_disable() is a no-op on CONFIG_PREEMPT=n anyway.
This is fine. The original rcu_ltimer patch needed #ifdef CONFIG_PREEMPT, so that it could be easily used with 2.4. With preemption in 2.5, rcu_read_xxx() can be preempt_xxx().
Thanks -- Dipankar Sarma <dipankar@in.ibm.com> http://lse.sourceforge.net Linux Technology Center, IBM Software Lab, Bangalore, India. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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