linux-kernel - [PATCH v2 2/2] fuse: remove usage of FR

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Date:   Wed, 13 Sep 2023 17:22:46 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     miklos@...redi.hu, bernd.schubert@...tmail.fm,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] fuse: remove usage of FR_WATING flag

Each allocated request from fuse_request_alloc counts to num_waiting
before request is freed.
Simply drop num_waiting without FR_WAITING flag check in fuse_put_request
to remove unneeded usage of FR_WAITING flag.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 fs/fuse/dev.c    | 9 +--------
 fs/fuse/fuse_i.h | 2 --
 2 files changed, 1 insertion(+), 10 deletions(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 59e1357d4880..4f49b1946635 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -139,7 +139,6 @@ static struct fuse_req *fuse_get_req(struct fuse_mount *fm, bool for_background)
 	req->in.h.gid = from_kgid(fc->user_ns, current_fsgid());
 	req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns);
 
-	__set_bit(FR_WAITING, &req->flags);
 	if (for_background)
 		__set_bit(FR_BACKGROUND, &req->flags);
 
@@ -171,11 +170,7 @@ static void fuse_put_request(struct fuse_req *req)
 			spin_unlock(&fc->bg_lock);
 		}
 
-		if (test_bit(FR_WAITING, &req->flags)) {
-			__clear_bit(FR_WAITING, &req->flags);
-			fuse_drop_waiting(fc);
-		}
-
+		fuse_drop_waiting(fc);
 		fuse_request_free(req);
 	}
 }
@@ -495,7 +490,6 @@ ssize_t fuse_simple_request(struct fuse_mount *fm, struct fuse_args *args)
 		if (!args->nocreds)
 			fuse_force_creds(req);
 
-		__set_bit(FR_WAITING, &req->flags);
 		__set_bit(FR_FORCE, &req->flags);
 	} else {
 		WARN_ON(args->nocreds);
@@ -556,7 +550,6 @@ int fuse_simple_background(struct fuse_mount *fm, struct fuse_args *args,
 		if (!req)
 			return -ENOMEM;
 		atomic_inc(&fc->num_waiting);
-		__set_bit(FR_WAITING, &req->flags);
 		__set_bit(FR_BACKGROUND, &req->flags);
 	} else {
 		WARN_ON(args->nocreds);
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index bf0b85d0b95c..a78764cef313 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -312,7 +312,6 @@ struct fuse_io_priv {
  * FR_ISREPLY:		set if the request has reply
  * FR_FORCE:		force sending of the request even if interrupted
  * FR_BACKGROUND:	request is sent in the background
- * FR_WAITING:		request is counted as "waiting"
  * FR_ABORTED:		the request was aborted
  * FR_INTERRUPTED:	the request has been interrupted
  * FR_LOCKED:		data is being copied to/from the request
@@ -326,7 +325,6 @@ enum fuse_req_flag {
 	FR_ISREPLY,
 	FR_FORCE,
 	FR_BACKGROUND,
-	FR_WAITING,
 	FR_ABORTED,
 	FR_INTERRUPTED,
 	FR_LOCKED,
-- 
2.30.0