| Date | Sun, 26 Jul 2009 08:17:05 -0000 | From | Thomas Gleixner <> | Subject | [Patch RFC 00/37] Cleanup init_MUTEX[_LOCKED] / DECLARE_MUTEX |
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There are still semaphores left which are used as mutexes. Many of them are not mutexes; they are used as completions and serialization object at the same time. Some others are simple mutexes and nobody bothered to clean them up.
Most of the cases have been identified in the preempt-rt patch. The conversion to mutexes has been tested with both lockdep and mutex debugging for quite a time. The other semaphore style users are simply converted to semaphores and the init_MUTEX[_LOCKED] / DECLARE_MUTEX confusion is removed.
Andrew: it would be great if we could merge the infrastructure patch [1/n] right away. It does not change any code as it just adds DEFINE_SEMAPHORE, semaphore_init() and semaphore_init_locked(). The latter is marked deprecated as well as the locked init usually points to a completion like use case. Merging it now would allow the maintainers to queue up the cleanup patches for .32
Thanks,
tglx
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