On Sat, 25 Apr 2015 23:56:16 +0900 Akinobu Mita <akinobu.mita@xxxxxxxxx> wrote: > Some architectures enable sg chaining option while others do not. > > The requirement to enable sg chaining is that pages must be aligned > at a 32-bit boundary in order to overload the LSB of the pointer. > Regardless of whether ARCH_HAS_SG_CHAIN is defined or not, the above > requirement is always chacked by BUG_ON() in sg_assign_page. So > all architectures can enable sg chaining. > > As you can see from the changes in drivers/target/target_core_rd.c, > enabling SG chaining for all architectures allows us to allocate > discontiguous scatterlist tables which can be traversed throughout > by sg_next() without a special handling for some architectures. Thanks, I'll grab this. If anyone has concerns, speak now or hold both pieces! -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
