suse man page for bdev_stack_limits

BDEV_STACK_LIMITS(9)						   Block Devices					      BDEV_STACK_LIMITS(9)

NAME
       bdev_stack_limits - adjust queue limits for stacked drivers

SYNOPSIS
       int bdev_stack_limits(struct queue_limits * t, struct block_device * bdev, sector_t start);

ARGUMENTS
       t
	   the stacking driver limits (top device)

       bdev
	   the component block_device (bottom)

       start
	   first data sector within component device

DESCRIPTION
       Merges queue limits for a top device and a block_device. Returns 0 if alignment didn't change. Returns -1 if adding the bottom device
       caused misalignment.

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