centos man page for bitmap_allocate_region

BITMAP_ALLOCATE_REGI(9) 				  Basic Kernel Library Functions				   BITMAP_ALLOCATE_REGI(9)

NAME
       bitmap_allocate_region - allocate bitmap region

SYNOPSIS
       int bitmap_allocate_region(unsigned long * bitmap, int pos, int order);

ARGUMENTS
       bitmap
	   array of unsigned longs corresponding to the bitmap

       pos
	   beginning of bit region to allocate

       order
	   region size (log base 2 of number of bits) to allocate

DESCRIPTION
       Allocate (set bits in) a specified region of a bitmap.

       Return 0 on success, or -EBUSY if specified region wasn't free (not all bits were zero).

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   BITMAP_ALLOCATE_REGI(9)