Re: [PATCH] atomic: add *_dec_not_zero

On Sun, May 8, 2011 at 05:33, Sven Eckelmann wrote:

Russell King - ARM Linux wrote:
[...]

quoted

Do we need atomic_dec_not_zero() et.al. in every arch header - is there =

no

quoted

generic header which it could be added to?

Mike Frysinger already tried to answer it in
[ref]:

quoted

that's what asm-generic is for. =C2=A0if the arch isnt using it, it's
either because the arch needs to convert to it, or they're using SMP
and asm-generic doesnt yet support that for atomic.h.

for example, the Blackfin port only needed updating for the SMP case.
in the non-SMP case, we're getting the def from asm-generic/atomic.h.

Feel free to change that but I just followed the style used by all other
macros and will not redesign the complete atomic*.h idea.

what you're doing is currently correct.  i think merging SMP support
into asm-generic for atomic* will take a bit of pondering first.
-mike