* Russell King - ARM Linux <[email protected]> [100623 11:06]: > On Wed, Jun 23, 2010 at 10:39:13AM +0300, Tony Lindgren wrote: > > Yeah that can be done for __kuser_get_tls if it's always writable. > > But __switch_to is trickier because of the CONFIG_MMU ifdefs there. > > And impossible with XIP kernels. > > > What if we have optional __switch_to and __kuser_get_tls implementations > > in the mm/proc-*.S files that get copied over the current locations > > if implemented? > > Also problematical with XIP - if we go down the route of implementing > these by copying code fragments into the kernel, we need to strip out > XIP support or implement a second way. Obviously having a second way > adds maintainence burden, and the second way will probably lose out > on updates.
How about if we implement the default XIP-safe unoptimized functions, with minimal iffdeffery and then allow optional override for non-XIP kernels from mm/proc-*.S files? Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
