centos man page for blkdev_issue_discard

BLKDEV_ISSUE_DISCARD(9) 					   Block Devices					   BLKDEV_ISSUE_DISCARD(9)

NAME
       blkdev_issue_discard - queue a discard

SYNOPSIS
       int blkdev_issue_discard(struct block_device * bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, unsigned long flags);

ARGUMENTS
       bdev
	   blockdev to issue discard for

       sector
	   start sector

       nr_sects
	   number of sectors to discard

       gfp_mask
	   memory allocation flags (for bio_alloc)

       flags
	   BLKDEV_IFL_* flags to control behaviour

DESCRIPTION
       Issue a discard request for the sectors in question.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   BLKDEV_ISSUE_DISCARD(9)