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* Christoph Hellwig <hch@infradead.org> wrote: > On Tue, Dec 13, 2005 at 08:54:41AM +0100, Ingo Molnar wrote: > > - i did not touch the 'struct semaphore' namespace, but introduced a > > 'struct compat_semaphore'. > > Because it's totally braindead. Your compat_semaphore is a real > semaphore and your semaphore is a mutex. So name them as such. well, i had the choice between a 30K patch, a 300K patch and a 3000K patch. I went for the 30K patch ;-) > > - i introduced a 'type-sensitive' macro wrapper that switches down() > > (and the other APIs) to either to the assembly variant (if the > > variable's type is struct compat_semaphore), or switches it to the new > > generic mutex (if the type is struct semaphore), at build-time. There > > is no runtime overhead due to this build-time-switching. > > And this one is probably is a great help to win the obsfucated C > contests, but otherwise just harmfull. i never found it to be harmful in any way, and we've now got a year of experience with them. Could you elaborate? Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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