Messages in this thread | | | Date | Tue, 28 Apr 2015 14:27:43 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] scatterlist: enable sg chaining for all architectures |
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On Sat, 25 Apr 2015 23:56:16 +0900 Akinobu Mita <akinobu.mita@gmail.com> 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!
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