Re: [PATCH libdrm 1/1] tests/exynos: Fix warnings

[Emil Velikov <emil.l.velikov@gmail.com>]

On 18/03/15 19:41, Jan Vesely wrote:
> On Wed, 2015-03-18 at 20:23 +0100, Tobias Jakobi wrote:
>> Hello Jan,
>>
>> Jan Vesely wrote:
>>> Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
>>> ---
>>>  tests/exynos/exynos_fimg2d_test.c | 3 ++-
>>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/tests/exynos/exynos_fimg2d_test.c b/tests/exynos/exynos_fimg2d_test.c
>>> index e7d9b72..dfb34ac 100644
>>> --- a/tests/exynos/exynos_fimg2d_test.c
>>> +++ b/tests/exynos/exynos_fimg2d_test.c
>>> @@ -183,7 +183,7 @@ static struct exynos_bo *exynos_create_buffer(struct exynos_device *dev,
>>>  
>>>  /* Allocate buffer and fill it with checkerboard pattern, where the tiles *
>>>   * have a random color. The caller has to free the buffer.                */
>>> -void *create_checkerboard_pattern(unsigned int num_tiles_x,
>>> +static void *create_checkerboard_pattern(unsigned int num_tiles_x,
>>>  						unsigned int num_tiles_y, unsigned int tile_size)
>>>  {
>>>  	unsigned int *buf;
>> Good catch with the missing static!
>>
>>
>>> @@ -573,6 +573,7 @@ static int g2d_checkerboard_test(struct exynos_device *dev,
>>>  		src_img.user_ptr[0].userptr = (unsigned long)checkerboard;
>>>  		src_img.user_ptr[0].size = img_w * img_h * 4;
>>>  		break;
>>> +	case G2D_IMGBUF_COLOR:
>>>  	default:
>>>  		ret = -EFAULT;
>>>  		goto fail;
>>>
>> Hmm, I don't see the reason why this label should be added to the switch
>> statement?
> 
> This is mostly to appease the compiler. -Wswitch-enum warns about
> missing enumeration cases even if default is present. On the other hand
> it also warns against branches that use values outside of the
> enumeration (which might be useful).
> 
> Emil, any thoughts about possibly dropping this warning? I think more
> people will scratch their heads if unused enumeration values need to be
> added to default branch.
> 
Fwiw mesa (and other projects) have addopted the approach of explicitly
handling each enum, and omitting the default statement.

Although considering that 1) this is a seldom run test and 2) things
have been as is (G2D_IMGBUF_COLOR implicitly handled by default) since
day 1, I'd say that either way is fine. Ideally Exynos people will cast
their vote, although I'm suspecting that this is not on their list.

Cheers,
Emil

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