centos man page for __bitmap_shift_left

__BITMAP_SHIFT_LEFT(9)					  Basic Kernel Library Functions				    __BITMAP_SHIFT_LEFT(9)

NAME
       __bitmap_shift_left - logical left shift of the bits in a bitmap

SYNOPSIS
       void __bitmap_shift_left(unsigned long * dst, const unsigned long * src, int shift, int bits);

ARGUMENTS
       dst
	   destination bitmap

       src
	   source bitmap

       shift
	   shift by this many bits

       bits
	   bitmap size, in bits

DESCRIPTION
       Shifting left (multiplying) means moving bits in the LS -> MS direction. Zeros are fed into the vacated LS bit positions and those MS bits
       shifted off the top are lost.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						    __BITMAP_SHIFT_LEFT(9)