On Fri, Jan 19, 2007 at 12:39:37PM -0500, Robert P. J. Day wrote:
> On Fri, 19 Jan 2007, Adrian Bunk wrote:
>
> > On Fri, Jan 19, 2007 at 11:56:30AM -0500, Robert P. J. Day wrote:
> > >
> > > Remove the macros that define simple "inlining" to mean forced
> > > inlining, since you can (and *should*) get that effect with the
> > > CONFIG_FORCED_INLINING kernel config variable instead.
> >
> > NAK.
> >
> > I don't see any place in the kernel where we need a non-forced
> > inline.
>
> that's not the point. the point is that, as it stands now, the build
> is *broken* in three ways.
>
> first, it's broken because declaring something simply as "inline"
> *forces* it to be inlined, which flies in the face of historical
> convention and is more than a little misleading.
In the kernel it's what you should expect since it's defined this way
for some time.
> second, it's broken because both the use of
> "__attribute__((always_inline))" all over the place and the
> CONFIG_FORCED_INLINING kernel config option imply that you indeed have
> a choice, when you clearly *don't*. quite simply, you can play with
> that kernel config option or splash the "always_inline" attributes
> around all you want and, unbeknownst to you, none of that is making
> the *slightest* bit of difference. that is the very *definition* of a
> "broken" build.
It's the definition of a broken option.
The solution is to remove CONFIG_FORCED_INLINING.
> and, finally, you claim that you "don't see any place in the kernel
> where we need a non-forced inline." i have already posted an alpha
> header file that claims (rightly or wrongly) to need that freedom.
> Q.E.D.
Not Q.E.D. due to "rightly or wrongly".
It could be because Alpha uses "extern inline" and with it's old
semantice I'd understand that always_inline might be a problem - but is
there actually any place where Alpha uses "extern inline" with this
semantics and not in a way that it could be replaced with "static inline"?
> > We have tons of inline's in C files that should simply be removed -
> > let's do this instead.
>
> that may be a better idea, but it doesn't address the current
> brokenness.
>
> i'm willing to believe that this patch has zero chance of going
> anywhere. but if you want to reject it, at least be honest about it.
> don't say, "there's no problem here." instead, say, "yes, the build
> is broken but we don't feel like doing anything about it."
Can you give at least one concrete example of actually broken code?
The only implication I know it has caused is increased code size, but
that's different from being "broken".
And that's not "but we don't feel like doing anything about it" - it's
"we should remove all the inline's from C files".
> rday
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
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