linux-kernel - Re: [PATCH 2/2] ata: ahci (gcc13): use U suffix for enum definitions

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Date:   Tue, 8 Nov 2022 14:01:24 +0900
From:   Damien Le Moal <damien.lemoal@...nsource.wdc.com>
To:     "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Martin Liska <mliska@...e.cz>,
        linux-ide@...r.kernel.org
Subject: Re: [PATCH 2/2] ata: ahci (gcc13): use U suffix for enum definitions

On 10/31/22 20:43, Jiri Slaby (SUSE) wrote:
> gcc13 now uses the type of the enum for all its members [1]. Given the
> ata enum defines its members using both unsigned and signed ints, the
> type of the enum is promoted to long.
> 
> Make sure the rest of the members are unsigned ints using U suffix.
> 
> The error in question is for example this:
>   drivers/block/mtip32xx/mtip32xx.c:722:25: error: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'long in'
> 
> [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36113
> 
> Cc: Martin Liska <mliska@...e.cz>
> Cc: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
> Cc: linux-ide@...r.kernel.org
> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
> ---
>  drivers/ata/ahci.h | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
> index 94b5c81f08dd..14eb6e97f6f7 100644
> --- a/drivers/ata/ahci.h
> +++ b/drivers/ata/ahci.h
> @@ -39,7 +39,7 @@
>  enum {
>  	AHCI_MAX_PORTS		= 32,
>  	AHCI_MAX_SG		= 168, /* hardware max is 64K */
> -	AHCI_DMA_BOUNDARY	= 0xffffffff,
> +	AHCI_DMA_BOUNDARY	= ~0U,

UINT_MAX ?

>  	AHCI_MAX_CMDS		= 32,
>  	AHCI_CMD_SZ		= 32,
>  	AHCI_CMD_SLOT_SZ	= AHCI_MAX_CMDS * AHCI_CMD_SZ,
> @@ -178,10 +178,10 @@ enum {
>  	PORT_CMD_SPIN_UP	= BIT(1), /* Spin up device */
>  	PORT_CMD_START		= BIT(0), /* Enable port DMA engine */
>  
> -	PORT_CMD_ICC_MASK	= (0xf << 28), /* i/f ICC state mask */
> -	PORT_CMD_ICC_ACTIVE	= (0x1 << 28), /* Put i/f in active state */
> -	PORT_CMD_ICC_PARTIAL	= (0x2 << 28), /* Put i/f in partial state */
> -	PORT_CMD_ICC_SLUMBER	= (0x6 << 28), /* Put i/f in slumber state */
> +	PORT_CMD_ICC_MASK	= (0xfU << 28), /* i/f ICC state mask */
> +	PORT_CMD_ICC_ACTIVE	= (0x1U << 28), /* Put i/f in active state */
> +	PORT_CMD_ICC_PARTIAL	= (0x2U << 28), /* Put i/f in partial state */
> +	PORT_CMD_ICC_SLUMBER	= (0x6U << 28), /* Put i/f in slumber state */
>  
>  	/* PORT_CMD capabilities mask */
>  	PORT_CMD_CAP		= PORT_CMD_HPCP | PORT_CMD_MPSP |
> @@ -191,14 +191,14 @@ enum {
>  	PORT_FBS_DWE_OFFSET	= 16, /* FBS device with error offset */
>  	PORT_FBS_ADO_OFFSET	= 12, /* FBS active dev optimization offset */
>  	PORT_FBS_DEV_OFFSET	= 8,  /* FBS device to issue offset */
> -	PORT_FBS_DEV_MASK	= (0xf << PORT_FBS_DEV_OFFSET),  /* FBS.DEV */
> +	PORT_FBS_DEV_MASK	= (0xfU << PORT_FBS_DEV_OFFSET),  /* FBS.DEV */
>  	PORT_FBS_SDE		= BIT(2), /* FBS single device error */
>  	PORT_FBS_DEC		= BIT(1), /* FBS device error clear */
>  	PORT_FBS_EN		= BIT(0), /* Enable FBS */
>  
>  	/* PORT_DEVSLP bits */
>  	PORT_DEVSLP_DM_OFFSET	= 25,             /* DITO multiplier offset */
> -	PORT_DEVSLP_DM_MASK	= (0xf << 25),    /* DITO multiplier mask */
> +	PORT_DEVSLP_DM_MASK	= (0xfU << 25),    /* DITO multiplier mask */
>  	PORT_DEVSLP_DITO_OFFSET	= 15,             /* DITO offset */
>  	PORT_DEVSLP_MDAT_OFFSET	= 10,             /* Minimum assertion time */
>  	PORT_DEVSLP_DETO_OFFSET	= 2,              /* DevSlp exit timeout */

-- 
Damien Le Moal
Western Digital Research