[PATCH 05/12] mm: alloc_contig_range() added

On Thu, Mar 31, 2011 at 06:26:45PM +0200, Michal Nazarewicz wrote:

quoted

In any case, please pull the ++ret bit out of the WARN_ON().  Some
people like to do:

#define WARN_ON(...) do{}while(0)

to save space on some systems.

I don't think that's the case.  Even if WARN_ON() decides not to print
a warning, it will still return the value of the argument.  If not,
a lot of code will brake.

WARN_ON() should never do anything but test. That ret++ does not belong
inside the WARN_ON() condition. If there are other locations in the
kernel that do that, then those locations need to be fixed.

-- Steve