diff options
| author | Jakob Koschel <jakobkoschel@gmail.com> | 2022-04-06 14:05:30 -0400 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2022-04-06 14:03:13 -0500 |
| commit | c490b3afaa579ab238f78c762d703441ccc898bd (patch) | |
| tree | 246d82618097b5595960409aaab1b74647389db5 /fs/dlm/lock.c | |
| parent | ba58995909b5098ca4003af65b0ccd5a8d13dd25 (diff) | |
| download | linux-c490b3afaa579ab238f78c762d703441ccc898bd.tar.gz | |
dlm: remove usage of list iterator for list_add() after the loop body
In preparation to limit the scope of a list iterator to the list
traversal loop, use a dedicated pointer to point to the found element [1].
Before, the code implicitly used the head when no element was found
when using &pos->list. Since the new variable is only set if an
element was found, the list_add() is performed within the loop
and only done after the loop if it is done on the list head directly.
Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/ [1]
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/lock.c')
| -rw-r--r-- | fs/dlm/lock.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index f5330e58d1fcb..20eca22617112 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -1321,13 +1321,17 @@ static inline void unhold_lkb(struct dlm_lkb *lkb) static void lkb_add_ordered(struct list_head *new, struct list_head *head, int mode) { - struct dlm_lkb *lkb = NULL; + struct dlm_lkb *lkb = NULL, *iter; - list_for_each_entry(lkb, head, lkb_statequeue) - if (lkb->lkb_rqmode < mode) + list_for_each_entry(iter, head, lkb_statequeue) + if (iter->lkb_rqmode < mode) { + lkb = iter; + list_add_tail(new, &iter->lkb_statequeue); break; + } - __list_add(new, lkb->lkb_statequeue.prev, &lkb->lkb_statequeue); + if (!lkb) + list_add_tail(new, head); } /* add/remove lkb to rsb's grant/convert/wait queue */ |