Re: [PATCH v3 01/10] iov_iter: Fix some checkpatch complaints in kunit tests

[Joe Perches <joe@perches.com>]

On Wed, 2023-11-15 at 15:49 +0000, David Howells wrote:
> Fix some checkpatch complaints in the new iov_iter kunit tests:
> 
>  (1) Some lines had eight spaces instead of a tab at the start.
> 
>  (2) Checkpatch doesn't like (void*)(unsigned long)0xnnnnnULL, so switch to
>      using POISON_POINTER_DELTA plus an offset instead.

That's because checkpatch is fundamentally stupid and
that's a false positive.

> diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
[]
> @@ -548,7 +548,7 @@ static void __init iov_kunit_extract_pages_kvec(struct kunit *test)
>  		size_t offset0 = LONG_MAX;
>  
>  		for (i = 0; i < ARRAY_SIZE(pagelist); i++)
> -			pagelist[i] = (void *)(unsigned long)0xaa55aa55aa55aa55ULL;
> +			pagelist[i] = (void *)POISON_POINTER_DELTA + 0x5a;

I think the original is easier to understand
or would best be replaced by a single #define
without the addition.

> @@ -626,7 +626,7 @@ static void __init iov_kunit_extract_pages_bvec(struct kunit *test)
>  		size_t offset0 = LONG_MAX;
>  
>  		for (i = 0; i < ARRAY_SIZE(pagelist); i++)
> -			pagelist[i] = (void *)(unsigned long)0xaa55aa55aa55aa55ULL;
> +			pagelist[i] = (void *)POISON_POINTER_DELTA + 0x5a;

etc...