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Subject[PATCH 2/2] ceph: replace usage of found with dedicated list iterator variable
Date
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@mail.gmail.com/ [1]
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
---
fs/ceph/caps.c | 32 +++++++++++++++-----------------
1 file changed, 15 insertions(+), 17 deletions(-)

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 519750bc5a1a..70f9c5ffa9b7 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -3179,10 +3179,9 @@ void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
struct ceph_snap_context *snapc)
{
struct inode *inode = &ci->vfs_inode;
- struct ceph_cap_snap *capsnap = NULL;
+ struct ceph_cap_snap *capsnap = NULL, *iter;
int put = 0;
bool last = false;
- bool found = false;
bool flush_snaps = false;
bool complete_capsnap = false;

@@ -3209,14 +3208,14 @@ void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
ci->i_wrbuffer_ref, ci->i_wrbuffer_ref_head,
last ? " LAST" : "");
} else {
- list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) {
- if (capsnap->context == snapc) {
- found = true;
+ list_for_each_entry(iter, &ci->i_cap_snaps, ci_item) {
+ if (iter->context == snapc) {
+ capsnap = iter;
break;
}
}

- if (!found) {
+ if (!capsnap) {
/*
* The capsnap should already be removed when removing
* auth cap in the case of a forced unmount.
@@ -3766,8 +3765,7 @@ static void handle_cap_flushsnap_ack(struct inode *inode, u64 flush_tid,
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
u64 follows = le64_to_cpu(m->snap_follows);
- struct ceph_cap_snap *capsnap;
- bool flushed = false;
+ struct ceph_cap_snap *capsnap = NULL, *iter;
bool wake_ci = false;
bool wake_mdsc = false;

@@ -3775,26 +3773,26 @@ static void handle_cap_flushsnap_ack(struct inode *inode, u64 flush_tid,
inode, ci, session->s_mds, follows);

spin_lock(&ci->i_ceph_lock);
- list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) {
- if (capsnap->follows == follows) {
- if (capsnap->cap_flush.tid != flush_tid) {
+ list_for_each_entry(iter, &ci->i_cap_snaps, ci_item) {
+ if (iter->follows == follows) {
+ if (iter->cap_flush.tid != flush_tid) {
dout(" cap_snap %p follows %lld tid %lld !="
- " %lld\n", capsnap, follows,
- flush_tid, capsnap->cap_flush.tid);
+ " %lld\n", iter, follows,
+ flush_tid, iter->cap_flush.tid);
break;
}
- flushed = true;
+ capsnap = iter;
break;
} else {
dout(" skipping cap_snap %p follows %lld\n",
- capsnap, capsnap->follows);
+ iter, iter->follows);
}
}
- if (flushed)
+ if (capsnap)
ceph_remove_capsnap(inode, capsnap, &wake_ci, &wake_mdsc);
spin_unlock(&ci->i_ceph_lock);

- if (flushed) {
+ if (capsnap) {
ceph_put_snap_context(capsnap->context);
ceph_put_cap_snap(capsnap);
if (wake_ci)
--
2.25.1
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