On Mon, 6 Aug 2012, Russell King - ARM Linux wrote: > On Mon, Aug 06, 2012 at 09:19:10AM -0400, Cyril Chemparathy wrote: > > With a flush_cache_all(), we could avoid having to operate a cacheline > > at a time, but that clobbers way more than necessary. > > You can't do that, because flush_cache_all() on some CPUs requires the > proper MMU mappings to be in place, and you can't get those mappings > in place because you don't have the V:P offsets fixed up in the kernel. > Welcome to the chicken and egg problem.
This problem is fixed in this case by having the p2v and v2p code sites using an out-of-line non optimized computation until those sites are runtime patched with the inlined optimized computation we have today. Nicolas -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
