On Fri, Apr 01, 2005 at 12:26:41PM -0800, Andrew Morton wrote:
> Matt Mackall <[email protected]> wrote:
> >
> > This patch tidies up those annoying kernel messages. A typical kernel
> > boot now looks like this:
> >
> > Loading Linux... Uncompressing kernel...
> > #
> >
> > See? Much nicer. This patch saves about 375k on my laptop config and
> > nearly 100k on minimal configs.
> >
>
> heh. Please take a look at
> http://www.uwsg.iu.edu/hypermail/linux/kernel/0004.2/0709.html, see if
> Graham did anything which you missed.
He's got a bunch of stuff that's not strictly related in there and
stuff I've already dealt with (vprintk and the like) and stuff that's
still forthcoming (panic tweaks, etc.). I also leave in all the APIs
like dmesg, they just no longer do anything.
> One problem was that
>
> printk("foo");
>
> will still cause the string "foo\0" to appear in the kernel image. That
> was fixed in later gcc's, but it would be interesting to know which
> compilers get it right.
Haven't encountered this. I think it should be fine for any compiler
that can handle 2.6. This has been in -tiny for nearly a year and a
half and no one's complained.
> > +static inline int printk(const char *s, ...) { return 0; }
>
> Actually printk() is supposed to return the number of chars which it
> printed. So if someone is doing:
>
> while (len < 40)
> len += printk("something");
>
> you've gone and made them lock up.
>
> But I think the number of places where we examine the printk return value
> is near zero.
Well in some sense 0 is the proper return but I suppose this could be
made to return 1. Small enough not break anything, big enough so that
things like the above get unstuck.
--
Mathematics is the supreme nostalgia of our time.
-
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]