On Fri, 2007-01-26 at 11:01 -0800, Nishanth Aravamudan wrote:
> I see what you're saying now. You're right that it's a bit fragile to
> rely on an extra function call to cause the alloca() loop to be
> optimized out, but we've so far avoided too much assembly in the
> source. 

Although they say "asm(..)", remember that they aren't real assembly.
They're completely gcc-portable.  In the kernel, they are in
include/linux/compiler-gcc.h, not in a specific arch's directory.

Granted it is a compiler "trick", but is is a very commonly accepted an
relied-upon one.  

-- Dave


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