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Re: [PATCH v2 01/13] block/stream: Remove redundant statement in stream_
From: |
Kevin Wolf |
Subject: |
Re: [PATCH v2 01/13] block/stream: Remove redundant statement in stream_run() |
Date: |
Wed, 26 Feb 2020 11:36:08 +0100 |
User-agent: |
Mutt/1.12.1 (2019-06-15) |
Am 26.02.2020 um 11:21 hat Chenqun (kuhn) geschrieben:
>
>
> >-----Original Message-----
> >From: Kevin Wolf [mailto:address@hidden]
> >Sent: Wednesday, February 26, 2020 5:51 PM
> >To: Chenqun (kuhn) <address@hidden>
> >Cc: address@hidden; address@hidden;
> >address@hidden; Zhanghailiang <address@hidden>;
> >Euler Robot <address@hidden>; John Snow <address@hidden>;
> >Max Reitz <address@hidden>
> >Subject: Re: [PATCH v2 01/13] block/stream: Remove redundant statement in
> >stream_run()
> >
> >Am 26.02.2020 um 09:46 hat address@hidden geschrieben:
> >> From: Chen Qun <address@hidden>
> >>
> >> Clang static code analyzer show warning:
> >> block/stream.c:186:9: warning: Value stored to 'ret' is never read
> >> ret = 0;
> >> ^ ~
> >> Reported-by: Euler Robot <address@hidden>
> >> Signed-off-by: Chen Qun <address@hidden>
> >> Reviewed-by: John Snow <address@hidden>
> >
> >Let's mention that this is unnecessary since commit 1d809098aa9.
> >
> >Since the same commit, the initialisation 'int ret = 0;' is unnecessary
> >because
> >we never read ret before overwriting the initial value. We could clean this
> >up
> >in the same patch.
>
> Yes, we can clean it and move 'ret' declaration to the for() statement.
>
> Modify just Like this:
> [...]
Godd point, makes sense to me. Please keep my R-b if you make this
change.
Kevin
> @@ -114,7 +114,6 @@ static int coroutine_fn stream_run(Job *job, Error **errp)
> int64_t offset = 0;
> uint64_t delay_ns = 0;
> int error = 0;
> - int ret = 0;
> int64_t n = 0; /* bytes */
>
> if (bs == s->bottom) {
> @@ -139,6 +138,7 @@ static int coroutine_fn stream_run(Job *job, Error **errp)
>
> for ( ; offset < len; offset += n) {
> bool copy;
> + int ret;
>
> /* Note that even when no rate limit is applied we need to yield
> * with no pending I/O here so that bdrv_drain_all() returns.
> @@ -183,7 +183,6 @@ static int coroutine_fn stream_run(Job *job, Error **errp)
> break;
> }
> }
> - ret = 0;
>
> /* Publish progress */
> job_progress_update(&s->common.job, n);
>
> >
> >With or without the changes:
> >
> >Reviewed-by: Kevin Wolf <address@hidden>
>
[PATCH v2 07/13] display/exynos4210_fimd: Remove redundant statement in exynos4210_fimd_update(), kuhn.chenqun, 2020/02/26
[PATCH v2 03/13] block/file-posix: Remove redundant statement in raw_handle_perm_lock(), kuhn.chenqun, 2020/02/26
[PATCH v2 10/13] migration/vmstate: Remove redundant statement in vmstate_save_state_v(), kuhn.chenqun, 2020/02/26
[PATCH v2 02/13] block/iscsi:Remove redundant statement in iscsi_open(), kuhn.chenqun, 2020/02/26