linux-kernel - Re: [PATCH] lpfc: use %zd format string for size

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Date:   Mon, 17 Oct 2016 08:53:33 -0700
From:   James Smart <james.smart@...adcom.com>
To:     Arnd Bergmann <arnd@...db.de>,
        James Smart <james.smart@...gotech.com>,
        Dick Kennedy <dick.kennedy@...gotech.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Hannes Reinecke <hare@...e.com>,
        James Bottomley <JBottomley@...n.com>,
        Sebastian Herbszt <herbszt@....de>,
        Johannes Thumshirn <jthumshirn@...e.de>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lpfc: use %zd format string for size_t

Thanks

Signed-off-by: James Smart <james.smart@...adcom.com>

-- james


On 10/17/2016 5:35 AM, Arnd Bergmann wrote:
> A recent bugfix introduced a harmless warning in the lpfc driver:
>
> drivers/scsi/lpfc/lpfc_init.c: In function 'lpfc_write_firmware':
> drivers/scsi/lpfc/lpfc_logmsg.h:56:45: error: format '%ld' expects argument of type 'long int', but argument 9 has type 'size_t {aka const unsigned int}' [-Werror=format=]
>
> 'size_t' is always the same width as 'long' in the kernel, but the compiler
> doesn't know that. The %z modifier is what the standard expects to be
> used here, and this shuts up the warning.
>
> Fixes: 679053c651fb ("scsi: lpfc: Fix fw download on SLI-4 FC adapters")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>   drivers/scsi/lpfc/lpfc_init.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
> index 7be9b8a7bb19..4776fd85514f 100644
> --- a/drivers/scsi/lpfc/lpfc_init.c
> +++ b/drivers/scsi/lpfc/lpfc_init.c
> @@ -10332,7 +10332,7 @@ lpfc_write_firmware(const struct firmware *fw, void *context)
>   	    ftype != LPFC_FILE_TYPE_GROUP || fsize != fw->size) {
>   		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
>   				"3022 Invalid FW image found. "
> -				"Magic:%x Type:%x ID:%x Size %d %ld\n",
> +				"Magic:%x Type:%x ID:%x Size %d %zd\n",
>   				magic_number, ftype, fid, fsize, fw->size);
>   		rc = -EINVAL;
>   		goto release_out;