Re: [Infiniband-general] Getting an Infiniband access layer in theLinux kernel

[Matti Aarnio <matti.aarnio@zmailer.org>]

On Fri, Feb 06, 2004 at 01:50:42PM -0500, Richard B. Johnson wrote:
....
> In spite of the fact that the gcc compiler I'm using doesn't
> care, and generates the same code either way, there are others
> in the world who have looked at Linux code, in particular
> the headers, and turned various shades of grey just before
> running off to the head. I have spent a bunch of time looking
> at C/C++ headers for Sun and W$ and the only place I've
> ever seen the "do {} while(0)" stuff is in Linux. I think
> it started with Linux (was a Linux Invention!), as some
> kind of work-around, then it became a "Linux Signature".

It is actually  "GCC Signature"  from way back when of 1.x versions
of gcc.  It is also exemplified by rather decent explanations, of why
  #define max(a,b) ((a > b) ? a : b)  
is bad, and should be done with way more complex thing involving
complex contortions of  do ... while(0) ...

> Cheers,
> Dick Johnson
> Penguin : Linux version 2.4.24 on an i986 machine (797.90 BogoMips).
>             Note 96.31% of all statistics are fiction.

/Matti Aarnio