[v2,2/2] powerpc32: add support for csum_add()

[Scott Wood]

On Tue, Feb 03, 2015 at 12:39:27PM +0100, LEROY Christophe wrote:
> The C version of csum_add() as defined in include/net/checksum.h gives the
> following assembly:
>        0:       7c 04 1a 14     add     r0,r4,r3
>        4:       7c 64 00 10     subfc   r3,r4,r0
>        8:       7c 63 19 10     subfe   r3,r3,r3
>        c:       7c 63 00 50     subf    r3,r3,r0
> 
> include/net/checksum.h also offers the possibility to define an arch specific
> function.
> This patch provides a ppc32 specific csum_add() inline function.

What makes it 32-bit specific?

-Scott