linux-kernel - Re: [PATCH] rds: send: mark expected switch fall-through in rds_rm

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Message-ID: <9b385269-7f13-983c-caf1-72e050acc6d9@oracle.com>
Date:   Tue, 20 Feb 2018 09:54:09 -0800
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, rds-devel@....oracle.com,
        linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <garsilva@...eddedor.com>
Subject: Re: [PATCH] rds: send: mark expected switch fall-through in
 rds_rm_size

Hi,

2/19/2018 10:10 AM, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch cases
> where we are expecting to fall through.
> 
> Addresses-Coverity-ID: 1465362 ("Missing break in switch")
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> ---
>   net/rds/send.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/net/rds/send.c b/net/rds/send.c
> index 028ab59..79d158b 100644
> --- a/net/rds/send.c
> +++ b/net/rds/send.c
> @@ -902,6 +902,8 @@ static int rds_rm_size(struct msghdr *msg, int num_sgs)
>   
>   		case RDS_CMSG_ZCOPY_COOKIE:
>   			zcopy_cookie = true;
> +			/* fall through */
> +
>   		case RDS_CMSG_RDMA_DEST:
>   		case RDS_CMSG_RDMA_MAP:
>   			cmsg_groups |= 2;
> 
So coverity greps for commet as "fall through" for
-Wimplicit-fallthrough build ?

Adding that comments itself if fine but was curious
about it if some one makes a spell error in this
comment what happens ;-)

For patch itself,
Acked-by: Santosh Shilimkar <santosh.shilimkar@...cle.com>