On Fri, Nov 7, 2014 at 6:30 AM, Arnd Bergmann arnd@arndb.de wrote:
On Friday 07 November 2014 13:11:30 Will Deacon wrote:
It's not that I care strongly about the interface, my main point is that the changelog doesn't describe why one interface was used instead the other.
I suspect the current approach was taken because it follows the same scheme as 32-bit ARM. If both methods are sufficient (Kees would have a better idea than me on that), then I don't have a strong preference.
Using the regset would probably address Oleg's comment, and would keep the implementation architecture specific. You could even share the NT_S390_SYSTEM_CALL number, but I don't know if there any downsides to doing that.
That's fine by me -- I only want an interface. :) I think it'd be nice to keep it the same between arm32 and arm64, but using a specific regset does seem to be the better approach.
-Kees