Re: [PATCH v2 8/9] pc-bios: s390x: Replace 0x00 with 0x0 or 0

[Thomas Huth <thuth@redhat.com>]

On 14/05/2020 14.37, Janosch Frank wrote:
> 0x00 looks odd, time to replace it with 0 or 0x0 (for pointers).
> 
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> ---
>  pc-bios/s390-ccw/dasd-ipl.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/pc-bios/s390-ccw/dasd-ipl.c b/pc-bios/s390-ccw/dasd-ipl.c
> index b932531e6f..764ee89e92 100644
> --- a/pc-bios/s390-ccw/dasd-ipl.c
> +++ b/pc-bios/s390-ccw/dasd-ipl.c
> @@ -98,18 +98,18 @@ static int run_dynamic_ccw_program(SubChannelId schid, uint16_t cutype,
>  
>  static void make_readipl(void)
>  {
> -    Ccw0 *ccwIplRead = (Ccw0 *)0x00;
> +    Ccw0 *ccwIplRead = (Ccw0 *)0x0;
>  
>      /* Create Read IPL ccw at address 0 */
>      ccwIplRead->cmd_code = CCW_CMD_READ_IPL;
> -    ccwIplRead->cda = 0x00; /* Read into address 0x00 in main memory */
> +    ccwIplRead->cda = 0x0; /* Read into address 0x00 in main memory */
>      ccwIplRead->chain = 0; /* Chain flag */
>      ccwIplRead->count = 0x18; /* Read 0x18 bytes of data */
>  }
>  
>  static void run_readipl(SubChannelId schid, uint16_t cutype)
>  {
> -    if (do_cio(schid, cutype, 0x00, CCW_FMT0)) {
> +    if (do_cio(schid, cutype, 0x0, CCW_FMT0)) {
>          panic("dasd-ipl: Failed to run Read IPL channel program\n");
>      }
>  }
> @@ -133,10 +133,10 @@ static void check_ipl2(uint32_t ipl2_addr)
>  {
>      Ccw0 *ccw = u32toptr(ipl2_addr);
>  
> -    if (ipl2_addr == 0x00) {
> +    if (ipl2_addr == 0) {
>          panic("IPL2 address invalid. Is this disk really bootable?\n");
>      }
> -    if (ccw->cmd_code == 0x00) {
> +    if (ccw->cmd_code == 0) {
>          panic("IPL2 ccw data invalid. Is this disk really bootable?\n");
>      }
>  }
> @@ -161,7 +161,7 @@ static void ipl1_fixup(void)
>      memcpy(ccwRead, (void *)0x08, 16);
>  
>      /* Disable chaining so we don't TIC to IPL2 channel program */
> -    ccwRead->chain = 0x00;
> +    ccwRead->chain = 0;
>  
>      ccwSeek->cmd_code = CCW_CMD_DASD_SEEK;
>      ccwSeek->cda = ptr2u32(seekData);
> @@ -206,7 +206,7 @@ static void run_ipl2(SubChannelId schid, uint16_t cutype, uint32_t addr)
>   */
>  void dasd_ipl(SubChannelId schid, uint16_t cutype)
>  {
> -    PSWLegacy *pswl = (PSWLegacy *) 0x00;
> +    PSWLegacy *pswl = (PSWLegacy *) 0x0;
>      uint32_t ipl2_addr;
>  
>      /* Construct Read IPL CCW and run it to read IPL1 from boot disk */
> 

Not sure whether this is really worth the churn ... but in case you insist:

Reviewed-by: Thomas Huth <thuth@redhat.com>