On Wed, Jun 23, 2010 at 12:28:44PM +0300, Tony Lindgren wrote: > * Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx> [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? That's what I was referring to by "second way". -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
