[PULL 5/5] 9pfs: Convert reclaim list to QSLIST

[Greg Kurz <groug@kaod.org>]

Use QSLIST instead of open-coding for a slightly improved readability.

No behavioral change.

Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <20210122143514.215780-1-groug@kaod.org>
Signed-off-by: Greg Kurz <groug@kaod.org>
---
 hw/9pfs/9p.c | 17 ++++++++---------
 hw/9pfs/9p.h |  2 +-
 2 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
index 3864d014b43c..5a6e2c9d3d7f 100644
--- a/hw/9pfs/9p.c
+++ b/hw/9pfs/9p.c
@@ -416,7 +416,9 @@ void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu)
 {
     int reclaim_count = 0;
     V9fsState *s = pdu->s;
-    V9fsFidState *f, *reclaim_list = NULL;
+    V9fsFidState *f;
+    QSLIST_HEAD(, V9fsFidState) reclaim_list =
+        QSLIST_HEAD_INITIALIZER(reclaim_list);
 
     QSIMPLEQ_FOREACH(f, &s->fid_list, next) {
         /*
@@ -448,8 +450,7 @@ void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu)
                  * a clunk request won't free this fid
                  */
                 f->ref++;
-                f->rclm_lst = reclaim_list;
-                reclaim_list = f;
+                QSLIST_INSERT_HEAD(&reclaim_list, f, reclaim_next);
                 f->fs_reclaim.fd = f->fs.fd;
                 f->fs.fd = -1;
                 reclaim_count++;
@@ -461,8 +462,7 @@ void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu)
                  * a clunk request won't free this fid
                  */
                 f->ref++;
-                f->rclm_lst = reclaim_list;
-                reclaim_list = f;
+                QSLIST_INSERT_HEAD(&reclaim_list, f, reclaim_next);
                 f->fs_reclaim.dir.stream = f->fs.dir.stream;
                 f->fs.dir.stream = NULL;
                 reclaim_count++;
@@ -476,15 +476,14 @@ void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu)
      * Now close the fid in reclaim list. Free them if they
      * are already clunked.
      */
-    while (reclaim_list) {
-        f = reclaim_list;
-        reclaim_list = f->rclm_lst;
+    while (!QSLIST_EMPTY(&reclaim_list)) {
+        f = QSLIST_FIRST(&reclaim_list);
+        QSLIST_REMOVE(&reclaim_list, f, V9fsFidState, reclaim_next);
         if (f->fid_type == P9_FID_FILE) {
             v9fs_co_close(pdu, &f->fs_reclaim);
         } else if (f->fid_type == P9_FID_DIR) {
             v9fs_co_closedir(pdu, &f->fs_reclaim);
         }
-        f->rclm_lst = NULL;
         /*
          * Now drop the fid reference, free it
          * if clunked.
diff --git a/hw/9pfs/9p.h b/hw/9pfs/9p.h
index 85fb6930b0ca..00381591ffa2 100644
--- a/hw/9pfs/9p.h
+++ b/hw/9pfs/9p.h
@@ -281,7 +281,7 @@ struct V9fsFidState {
     int ref;
     bool clunked;
     QSIMPLEQ_ENTRY(V9fsFidState) next;
-    V9fsFidState *rclm_lst;
+    QSLIST_ENTRY(V9fsFidState) reclaim_next;
 };
 
 typedef enum AffixType_t {
-- 
2.26.2