Re: [PATCH for-4.2] hw/i386: Fix compiler warning when CONFIG_IDE_ISA is disabled

[Thomas Huth <thuth@redhat.com>]

On 15/11/2019 16.54, Peter Maydell wrote:
> On Fri, 15 Nov 2019 at 15:10, Thomas Huth <thuth@redhat.com> wrote:
>>
>> When CONFIG_IDE_ISA is disabled, compilation currently fails:
>>
>>  hw/i386/pc_piix.c: In function ‘pc_init1’:
>>  hw/i386/pc_piix.c:81:9: error: unused variable ‘i’ [-Werror=unused-variable]
>>
>> Move the variable declaration to the right code block to avoid
>> this problem.
>>
>> Fixes: 4501d317b50e ("hw/i386/pc: Extract pc_i8259_create()")
>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>> ---
>>  hw/i386/pc_piix.c | 3 +--
>>  1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
>> index 2aefa3b8df..d187db761c 100644
>> --- a/hw/i386/pc_piix.c
>> +++ b/hw/i386/pc_piix.c
>> @@ -78,7 +78,6 @@ static void pc_init1(MachineState *machine,
>>      X86MachineState *x86ms = X86_MACHINE(machine);
>>      MemoryRegion *system_memory = get_system_memory();
>>      MemoryRegion *system_io = get_system_io();
>> -    int i;
>>      PCIBus *pci_bus;
>>      ISABus *isa_bus;
>>      PCII440FXState *i440fx_state;
>> @@ -253,7 +252,7 @@ static void pc_init1(MachineState *machine,
>>      }
>>  #ifdef CONFIG_IDE_ISA
>>  else {
>> -        for(i = 0; i < MAX_IDE_BUS; i++) {
>> +        for (int i = 0; i < MAX_IDE_BUS; i++) {
>>              ISADevice *dev;
>>              char busname[] = "ide.0";
>>              dev = isa_ide_init(isa_bus, ide_iobase[i], ide_iobase2[i],
> 
> Don't put variable declarations inside 'for' statements,
> please. They should go at the start of a {} block.

Why? We're using -std=gnu99 now, so this should not be an issue anymore.

 Thomas