The patch titled
Subject: ocfs2: replace usage of found with dedicated list iterator variable
has been added to the -mm tree. Its filename is
ocfs2-replace-usage-of-found-with-dedicated-list-iterator-variable.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/ocfs2-replace-usage-of-found-with-dedicated-list-iterator-variable.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-replace-usage-of-found-with-dedicated-list-iterator-variable.patch
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------------------------------------------------------
From: Jakob Koschel <jakobkoschel@xxxxxxxxx>
Subject: ocfs2: replace usage of found with dedicated list iterator variable
To move the list iterator variable into the list_for_each_entry_*() macro
in the future it should be avoided to use the list iterator variable after
the loop body.
To *never* use the list iterator variable after the loop it was concluded
to use a separate iterator variable instead of a found boolean [1].
This removes the need to use a found variable and simply checking if the
variable was set, can determine if the break/goto was hit.
Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@xxxxxxxxxxxxxx/
Link: https://lkml.kernel.org/r/20220324071650.61168-1-jakobkoschel@xxxxxxxxx
Signed-off-by: Jakob Koschel <jakobkoschel@xxxxxxxxx>
Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Cc: Mark Fasheh <mark@xxxxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Changwei Ge <gechangwei@xxxxxxx>
Cc: Gang He <ghe@xxxxxxxx>
Cc: Jun Piao <piaojun@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/dlm/dlmunlock.c | 21 ++++++++++-----------
fs/ocfs2/quota_local.c | 10 +++++-----
2 files changed, 15 insertions(+), 16 deletions(-)
--- a/fs/ocfs2/dlm/dlmunlock.c~ocfs2-replace-usage-of-found-with-dedicated-list-iterator-variable
+++ a/fs/ocfs2/dlm/dlmunlock.c
@@ -392,9 +392,9 @@ int dlm_unlock_lock_handler(struct o2net
struct dlm_ctxt *dlm = data;
struct dlm_unlock_lock *unlock = (struct dlm_unlock_lock *)msg->buf;
struct dlm_lock_resource *res = NULL;
- struct dlm_lock *lock = NULL;
+ struct dlm_lock *lock = NULL, *iter;
enum dlm_status status = DLM_NORMAL;
- int found = 0, i;
+ int i;
struct dlm_lockstatus *lksb = NULL;
int ignore;
u32 flags;
@@ -437,7 +437,6 @@ int dlm_unlock_lock_handler(struct o2net
}
queue=&res->granted;
- found = 0;
spin_lock(&res->spinlock);
if (res->state & DLM_LOCK_RES_RECOVERING) {
spin_unlock(&res->spinlock);
@@ -461,21 +460,21 @@ int dlm_unlock_lock_handler(struct o2net
}
for (i=0; i<3; i++) {
- list_for_each_entry(lock, queue, list) {
- if (lock->ml.cookie == unlock->cookie &&
- lock->ml.node == unlock->node_idx) {
- dlm_lock_get(lock);
- found = 1;
+ list_for_each_entry(iter, queue, list) {
+ if (iter->ml.cookie == unlock->cookie &&
+ iter->ml.node == unlock->node_idx) {
+ dlm_lock_get(iter);
+ lock = iter;
break;
}
}
- if (found)
+ if (lock)
break;
/* scan granted -> converting -> blocked queues */
queue++;
}
spin_unlock(&res->spinlock);
- if (!found) {
+ if (!lock) {
status = DLM_IVLOCKID;
goto not_found;
}
@@ -505,7 +504,7 @@ int dlm_unlock_lock_handler(struct o2net
dlm_kick_thread(dlm, res);
not_found:
- if (!found)
+ if (!lock)
mlog(ML_ERROR, "failed to find lock to unlock! "
"cookie=%u:%llu\n",
dlm_get_lock_cookie_node(be64_to_cpu(unlock->cookie)),
--- a/fs/ocfs2/quota_local.c~ocfs2-replace-usage-of-found-with-dedicated-list-iterator-variable
+++ a/fs/ocfs2/quota_local.c
@@ -923,19 +923,19 @@ static struct ocfs2_quota_chunk *ocfs2_f
{
struct mem_dqinfo *info = sb_dqinfo(sb, type);
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
- struct ocfs2_quota_chunk *chunk;
+ struct ocfs2_quota_chunk *chunk = NULL, *iter;
struct ocfs2_local_disk_chunk *dchunk;
int found = 0, len;
- list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
+ list_for_each_entry(iter, &oinfo->dqi_chunk, qc_chunk) {
dchunk = (struct ocfs2_local_disk_chunk *)
- chunk->qc_headerbh->b_data;
+ iter->qc_headerbh->b_data;
if (le32_to_cpu(dchunk->dqc_free) > 0) {
- found = 1;
+ chunk = iter;
break;
}
}
- if (!found)
+ if (!chunk)
return NULL;
if (chunk->qc_num < oinfo->dqi_chunks - 1) {
_
Patches currently in -mm which might be from jakobkoschel@xxxxxxxxx are
ocfs2-replace-usage-of-found-with-dedicated-list-iterator-variable.patch
