suse man page for might_sleep

MIGHT_SLEEP(9)							   Driver Basics						    MIGHT_SLEEP(9)

NAME
       might_sleep - annotation for functions that can sleep

SYNOPSIS
       might_sleep(void);

ARGUMENTS
       None

DESCRIPTION
       this macro will print a stack trace if it is executed in an atomic context (spinlock, irq-handler, ...).

       This is a useful debugging help to be able to catch problems early and not be bitten later when the calling function happens to sleep when
       it is not supposed to.

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