centos man page for work_busy

WORK_BUSY(9)							   Driver Basics						      WORK_BUSY(9)

NAME
       work_busy - test whether a work is currently pending or running

SYNOPSIS
       unsigned int work_busy(struct work_struct * work);

ARGUMENTS
       work
	   the work to be tested

DESCRIPTION
       Test whether work is currently pending or running. There is no synchronization around this function and the test result is unreliable and
       only useful as advisory hints or for debugging.

RETURNS
       OR'd bitmask of WORK_BUSY_* bits.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							      WORK_BUSY(9)