tree 29988ebe5a40ee1092bdbeac45eb0bdc312ff670
parent 10d3bd09a3c25df114f74f7f86e1b58d070bef32
author Takahiro Yasui <tyasui@redhat.com> 1231211099 +0000
committer Alasdair G Kergon <agk@redhat.com> 1231211099 +0000

dm log: avoid reinitialising io_req on every operation

rw_header function updates three members of io_req data every time
when I/O is processed. bi_rw and notify.fn are never modified once
they get initialized, and so they can be set in advance.

header_to_disk() can also be pulled out of write_header() since only one
caller needs it and write_header() can be replaced by rw_header()
directly.

Signed-off-by: Takahiro Yasui <tyasui@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>