On Monday 23 July 2007 18:05:58 Satyam Sharma wrote: > From: Satyam Sharma <[EMAIL PROTECTED]> > > [6/8] i386: bitops: Don't mark memory as clobbered unnecessarily > > The goal is to let gcc generate good, beautiful, optimized code.
The first goal is correct code. The reason for the memory barrier is to prevent other memory references from being moved over the atomic reference. e.g. when a bit is used to communicate with another CPU this might be dangerous. I don't think it's a good idea to remove them. It'll likely introduce subtle bugs. Atomic bitops tend to be so slow anyways that it doesn't make much difference. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
