suse man page for blk_add_trace_remap

BLK_ADD_TRACE_REMAP(9)						   Block Devices					    BLK_ADD_TRACE_REMAP(9)

NAME
       blk_add_trace_remap - Add a trace for a remap operation

SYNOPSIS
       void blk_add_trace_remap(struct request_queue * q, struct bio * bio, dev_t dev, sector_t from);

ARGUMENTS
       q
	   queue the io is for

       bio
	   the source bio

       dev
	   target device

       from
	   source sector

DESCRIPTION
       Device mapper or raid target sometimes need to split a bio because it spans a stripe (or similar). Add a trace for that action.

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