linux-kernel - Re: [PATCH] scsi: ncr53c8xx: Remove unused retrieve_from_waiting

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Date:   Wed, 8 Sep 2021 11:13:51 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Helge Deller <deller@....de>
Cc:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Hannes Reinecke <hare@...e.com>, linux-parisc@...r.kernel.org
Subject: Re: [PATCH] scsi: ncr53c8xx: Remove unused
 retrieve_from_waiting_list() function

On Tue, Sep 07, 2021 at 11:00:44PM +0200, Helge Deller wrote:
> Drop retrieve_from_waiting_list() to avoid this warning:
> drivers/scsi/ncr53c8xx.c:8000:26: warning: ‘retrieve_from_waiting_list’ defined but not used [-Wunused-function]
> 
> Fixes: 1c22e327545c ("scsi: ncr53c8xx: Remove unused code")
> Signed-off-by: Helge Deller <deller@....de>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Tested-by: Guenter Roeck <linux@...ck-us.net>

> 
> diff --git a/drivers/scsi/ncr53c8xx.c b/drivers/scsi/ncr53c8xx.c
> index 7a4f5d4dd670..2b8c6fa5e775 100644
> --- a/drivers/scsi/ncr53c8xx.c
> +++ b/drivers/scsi/ncr53c8xx.c
> @@ -1939,11 +1939,8 @@ static	void	ncr_start_next_ccb (struct ncb *np, struct lcb * lp, int maxn);
>  static	void	ncr_put_start_queue(struct ncb *np, struct ccb *cp);
> 
>  static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd);
> -static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd);
>  static void process_waiting_list(struct ncb *np, int sts);
> 
> -#define remove_from_waiting_list(np, cmd) \
> -		retrieve_from_waiting_list(1, (np), (cmd))
>  #define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
>  #define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
> 
> @@ -7997,26 +7994,6 @@ static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd)
>  	}
>  }
> 
> -static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd)
> -{
> -	struct scsi_cmnd **pcmd = &np->waiting_list;
> -
> -	while (*pcmd) {
> -		if (cmd == *pcmd) {
> -			if (to_remove) {
> -				*pcmd = (struct scsi_cmnd *) cmd->next_wcmd;
> -				cmd->next_wcmd = NULL;
> -			}
> -#ifdef DEBUG_WAITING_LIST
> -	printk("%s: cmd %lx retrieved from waiting list\n", ncr_name(np), (u_long) cmd);
> -#endif
> -			return cmd;
> -		}
> -		pcmd = (struct scsi_cmnd **) &(*pcmd)->next_wcmd;
> -	}
> -	return NULL;
> -}
> -
>  static void process_waiting_list(struct ncb *np, int sts)
>  {
>  	struct scsi_cmnd *waiting_list, *wcmd;