On Tue, 2007-05-22 at 14:38 +0530, Nitin Gupta wrote:
[...]
> On 5/18/07, Andrey Panin <[email protected]> wrote:
> > On 138, 05 18, 2007 at 03:28:31PM +0530, Nitin Gupta wrote:
> > > + register const unsigned char *ip;
> >
> > register keyword is meaningless for today's compiler.
>
> But can we assume that gcc is being used? What if we use compiler for
Yes.
If another compiler wants to compile the kernel, it must have
implemented various widely used gcc extensions.
> which it does matter (can't give example for this...)?
The "register" keyword is and was always from start *at most* a hint to
the C compiler to use a register for that variable (similar to "inline"
BTW).
So every C compiler is allowed to simply ignore the "register" for any
reason - be it "not implemented" or "the compiler knows better".
Trivial reason: Think of a function with 100 register variables.
Bernd
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