libceph: advance pagelist with list_rotate_left()

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While processing an outgoing pagelist (either the data pagelist or
trail) in a ceph message, the messenger cycles through each of the
pages on the list.  This is accomplished in out_msg_pos_next(), if
the end of the first page on the list is reached, the first page is
moved to the end of the list.

There is a list operation, list_rotate_left(), which performs
exactly this operation, and by using it, what's really going on
becomes more obvious.

So replace these two list_move_tail() calls with list_rotate_left().

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

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Alex Elder 2013-03-06 23:39:38 -06:00 • committed by Sage Weil

parent e788182fa6

commit 35c7bfbcd4

1 changed files with 2 additions and 4 deletions

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net/ceph/messenger.c

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