Russell King <[email protected]> wrote:
>
> On Thu, Jun 30, 2005 at 08:52:25AM +0300, Denis Vlasenko wrote:
> > Hi Andrew,
> >
> > Optimizing delay functions for speed is utterly pointless.
> >
> > This patch turns ssleep(n), mdelay(n), udelay(n) and ndelay(n)
> > into functions, thus they generate the smallest possible code
> > at the callsite. Previously they were more or less inlined.
> >
> > Run tested. Saved a few kb off vmlinux.
> >
> > Signed-off-by: Denis Vlasenko <[email protected]>
>
> Rejected-by: Russell King 8)
>
> The reason is that now we're unable to find out if anyone's doing
> udelay(100000000000000000) which breaks on most architectures.
>
> There are a number of compile-time checks that your patch has removed
> which catch such things, and as such your patch is not acceptable.
> Some architectures have a lower threshold of acceptability for the
> maximum udelay value, so it's absolutely necessary to keep this.
It removes that check from x86 - other architectures retain it.
I don't recall seeing anyone trigger the check, and it hardly seems worth
adding a "few kb" to vmlinux for it?
-
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]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
