Re: [SMP lock BUG?] Re: Feedback on preemptible kernel patch

Robert Love (rml@tech9.net)
17 Sep 2001 18:41:46 -0400

On Fri, 2001-09-14 at 05:15, Pavel Machek wrote:
> is it legal to kmap_atomic(a,b); kmap_atomic(c,d); kunmap_atomic(a,b); ?
> If so, your patch may need some ounting....

ctx_sw_on and ctx_sw_off use a recursive spinlock, so the calls to
kunmap_atomic won't drop the slock until the last call.

-- 
Robert M. Love
rml at ufl.edu
rml at tech9.net


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