Re: [RFC][PATCH] introduce ptr_diff()

Bernd Petrovitsch
2010-08-19T13:05:23Z

On Don, 2010-08-19 at 14:59 +0200, Andi Kleen wrote:
> > If so, the warning seems valid as sizeof(struct page) is probably not
> > (always) a power of 2. On a native build on x86_64 it is 56 bytes
> > hereover.
> > Hmm ....
>
> gcc just generats a mull with inverted value. mull is cheap on any
> reasonable CPU. Please fix sparse.

Not that I really know the code of sparse but what would be an
acceptable condition (except plain simply disabling/removing the warning
as such)?
No warning if it's a constant value (read: explicit or sizeof())?

Bernd
--
Bernd Petrovitsch Email : bernd@petrovitsch.priv.at
LUGA : http://www.luga.at