| | Date | Tue, 13 Dec 2005 11:13:34 +1100 | | From | Nick Piggin <> | | Subject | Re: [PATCH 1/19] MUTEX: Introduce simple mutex implementation |
David Howells wrote: > The attached patch introduces a simple mutex implementation as an alternative > to the usual semaphore implementation where simple mutex functionality is all > that is required. > > This is useful in two ways: > > (1) A number of archs only provide very simple atomic instructions (such as > XCHG on i386, TAS on M68K, SWAP on FRV) which aren't sufficient to > implement full semaphore support directly. Instead spinlocks must be > employed to implement fuller functionality. >
We have atomic_cmpxchg. Can you use that for a sufficient generic implementation?
-- SUSE Labs, Novell Inc.
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