Messages in this thread | | | Subject | Re: [RFC PATCH 02/33] Add sync bitops | From | Arjan van de Ven <> | Date | Tue, 18 Jul 2006 11:56:41 +0200 |
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On Tue, 2006-07-18 at 00:00 -0700, Chris Wright wrote: > plain text document attachment (synch-ops) > Add "always lock'd" implementations of set_bit, clear_bit and > change_bit and the corresponding test_and_ functions. Also add > "always lock'd" implementation of cmpxchg. These give guaranteed > strong synchronisation and are required for non-SMP kernels running on > an SMP hypervisor.
Hi,
this sounds really like the wrong approach; you know you're compiling for xen, so why not just make set_bit() and the others use the lock'd instructions at compile time?
Greetings, Arjan van de Ven
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