snd_bug_on(9) suse man page | unix.com

SND_BUG_ON(9)							   Sound Devices						     SND_BUG_ON(9)

NAME
       snd_BUG_ON - debugging check macro

SYNOPSIS
       snd_BUG_ON(cond);

ARGUMENTS
       cond
	   condition to evaluate

DESCRIPTION
       When CONFIG_SND_DEBUG is set, this macro evaluates the given condition, and call WARN and returns the value if it's non-zero.

       When CONFIG_SND_DEBUG is not set, this just returns zero, and the given condition is ignored.

NOTE
       the argument won't be evaluated at all when CONFIG_SND_DEBUG=n. Thus, don't put any statement that influences on the code behavior, such as
       pre/post increment, to the argument of this macro. If you want to evaluate and give a warning, use standard WARN_ON.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							     SND_BUG_ON(9)