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SubjectRe: [SMP lock BUG?] Re: Feedback on preemptible kernel patch
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On Sat, 2001-09-08 at 19:11, Manfred Spraul wrote:
> No.
> It seems to be a missing ctx_sw_off() in highmem.h:
> kmap_atomic uses a per-cpu variable, thus ctx_sw_off() is needed in
> kmap_atomic, and ctx_sw_on() in kunmap_atomic().

in my tree, kmap_atomic and kunmap_atomic are just defined to
kmap/kunmap. are you suggesting something like this?

#define kmap_atomic(page,idx) ctx_sw_off(); kmap(page);
#define kunmap_atomic(page,idx) ctx_sw_on(); kunmap(page);

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

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