linux-kernel - Re: [PATCH][next] fs/ntfs3: Fix fall-through warnings for Clang

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Message-ID: <6b9a6c49-1b32-c5bc-6313-b0a888e93923@kernel.org>
Date:   Wed, 18 Aug 2021 16:29:18 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Cc:     ntfs3@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] fs/ntfs3: Fix fall-through warnings for Clang

On 8/18/2021 3:21 PM, Gustavo A. R. Silva wrote:
> Fix the following fallthrough warnings:
> 
> fs/ntfs3/inode.c:1792:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
> fs/ntfs3/index.c:178:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
> 
> This helps with the ongoing efforts to globally enable
> -Wimplicit-fallthrough for Clang.
> 
> Link: https://github.com/KSPP/linux/issues/115
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

> ---
>   fs/ntfs3/index.c | 1 +
>   fs/ntfs3/inode.c | 1 +
>   2 files changed, 2 insertions(+)
> 
> diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
> index 6aa9540ece47..76eae60b7fce 100644
> --- a/fs/ntfs3/index.c
> +++ b/fs/ntfs3/index.c
> @@ -175,6 +175,7 @@ static inline NTFS_CMP_FUNC get_cmp_func(const struct INDEX_ROOT *root)
>   		default:
>   			break;
>   		}
> +		break;
>   	default:
>   		break;
>   	}
> diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
> index bf51e294432e..a573c6e98cb8 100644
> --- a/fs/ntfs3/inode.c
> +++ b/fs/ntfs3/inode.c
> @@ -1789,6 +1789,7 @@ int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry)
>   	switch (err) {
>   	case 0:
>   		drop_nlink(inode);
> +		break;
>   	case -ENOTEMPTY:
>   	case -ENOSPC:
>   	case -EROFS:
>