Re: [PATCH 2/3] msm: iommu: Generalize platform data for multiple targets

Daniel Walker
2011-02-11T20:58:21Z

On Fri, 2011-02-11 at 12:51 -0800, Steve Muckle wrote:
> On 02/11/11 12:42, Daniel Walker wrote:
> >> static struct resource msm_iommu_jpegd_resources[] = {
> >> {
> >> - .start = MSM_IOMMU_JPEGD_PHYS,
> >> - .end = MSM_IOMMU_JPEGD_PHYS + MSM_IOMMU_JPEGD_SIZE - 1,
> >> + .start = 0x07300000,
> >> + .end = 0x07300000 + SZ_1M - 1,
> >
> > Looks worse .. Just put the macros into a static header file for both.
>
> Why bother defining macros for these if they only appear here? I don't
> think that adds any value or readability - these addresses are clearly
> the physical area for the msm_iommu_jpegd. It just makes it more
> annoying to have to look up the values in a separate file if you are
> wondering what they are.

So your saying if you look at the number 0x07300000 you instantly know
that this JPEGD? What if I pick a random other kernel developer do you
think they would instantly know that? I have no idea what 0x07300000 is.

Also if it's in a header you could ifdef them with out touching the C
file, which is just forward looking.

Daniel

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