On Mon, Aug 08, 2005 at 12:11:21PM +0200, Takashi Iwai wrote:
> At Sat, 6 Aug 2005 17:09:40 +0200,
> Adrian Bunk wrote:
> >
> >
> > Looking at how few is left from kcalloc, can't we make it a
> > "static inline" function in slab.h?
> >
> > This would optimize nicely for all of the users where the first or even
> > the first two parameters are constant at compile-time and shouldn't do
> > much harm for the other users.
> >
> > As a side effect, the difference between kcalloc(1, ...) and kzalloc()
> > would become a coding style question without any effect on the generated
> > code.
>
> How about to use __builtin_constant_p() like kmalloc?
> The code readability would be worsen, though...
Where should this make any difference?
If the function is "static inline", gcc can e.g. always determine at
compile-time that 1 >= 0 can never be false and therefore optimize it
away.
> Takashi
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |