linux-kernel - Re: [PATCH] btrfs: fix uninitialized variable warning

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Message-ID: <CAOd03yRsQATvvnV=U-RZvuKXrio-Wb-+nFZiYN45CgeEYOgWgw@mail.gmail.com>
Date:   Sun, 23 Apr 2023 17:21:53 +0800
From:   genjian zhang <zhanggenjian123@...il.com>
To:     dsterba@...e.cz
Cc:     clm@...com, josef@...icpanda.com, dsterba@...e.com,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        Genjian Zhang <zhanggenjian@...inos.cn>,
        k2ci <kernel-bot@...inos.cn>
Subject: Re: [PATCH] btrfs: fix uninitialized variable warning

On Fri, Apr 7, 2023 at 3:12 AM David Sterba <dsterba@...e.cz> wrote:
>
> On Fri, Mar 24, 2023 at 10:08:38AM +0800, Genjian wrote:
> > From: Genjian Zhang <zhanggenjian@...inos.cn>
> >
> > compiler warning:
> >
> > ../fs/btrfs/volumes.c: In function ‘btrfs_init_new_device’:
> > ../fs/btrfs/volumes.c:2703:3: error: ‘seed_devices’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
> >  2703 |   btrfs_setup_sprout(fs_info, seed_devices);
> >       |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > ../fs/btrfs/send.c: In function ‘get_cur_inode_state’:
> > ../include/linux/compiler.h:70:32: error: ‘right_gen’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
> >    70 |   (__if_trace.miss_hit[1]++,1) :  \
> >       |                                ^
> > ../fs/btrfs/send.c:1878:6: note: ‘right_gen’ was declared here
> >  1878 |  u64 right_gen;
> >       |      ^~~~~~~~~
> >
> > Initialize the uninitialized variables.
> >
> > Reported-by: k2ci <kernel-bot@...inos.cn>
> > Signed-off-by: Genjian Zhang <zhanggenjian@...inos.cn>
>
> The warnings are still reported by other build reports so I'll apply
> this patch. If you have found more please send a patch or I can update
> this one once applied. Thanks.

Sorry for the late reply.
At present, only this one has been found.
Thanks.