block: Add bio_clone_fast()
authorKent Overstreet <kmo@daterainc.com>
Sun, 24 Nov 2013 02:19:27 +0000 (18:19 -0800)
committerKent Overstreet <kmo@daterainc.com>
Sun, 24 Nov 2013 06:33:54 +0000 (22:33 -0800)
commit59d276fe02d7e887a4825ef05c80b8f8c54ba60a
treedbb8c78a922d47652c08d9f5e46d77708ac95543
parentbdb53207411ae39b8a80dda0a66d1b468cbe1380
block: Add bio_clone_fast()

bio_clone() just got more expensive - however, most users of bio_clone()
don't actually need to modify the biovec. If they aren't modifying the
biovec, and they can guarantee that the original bio isn't freed before
the clone (also true in most cases), we can just point the clone at the
original bio's biovec.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
drivers/md/bcache/request.c
fs/bio.c
include/linux/bio.h