From: Junichi Nomura Date: Fri, 3 Oct 2014 11:55:16 +0000 (+0000) Subject: dm: remove nr_iovecs parameter from alloc_tio() X-Git-Tag: omap-for-v3.19/prcm-cleanup~48^2~8 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=997782735c0f1e2e069337129fe0d5738d83d19b;p=pandora-kernel.git dm: remove nr_iovecs parameter from alloc_tio() alloc_tio() uses bio_alloc_bioset() to allocate a clone-bio for a bio. alloc_tio() takes the number of bvecs to allocate for the clone-bio. However, with v3.14's immutable biovec changes DM now uses __bio_clone_fast() and no longer needs to allocate bvecs. In practice, the 'nr_iovecs' passed to alloc_tio() is always effectively 0. __clone_and_map_simple_bio() looked like it was passing non-zero nr_iovecs, but its value was always within the range of inline bvecs and no allocation actually happened. If allocation happened, the BUG_ON() in __bio_clone_fast() would've triggered. Remove the nr_iovecs parameter from alloc_tio() to prevent possible future bio_alloc_bioset() mis-use of a new bioset interface that will no longer allow bvecs to be allocated. Also fix extra whitespace before the __bio_clone_fast() call in __clone_and_map_simple_bio(). Signed-off-by: Jun'ichi Nomura Signed-off-by: Mike Snitzer --- Reading git-diff-tree failed