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Subject: Re: [PATCH v5 03/16] media: rkisp1: Add user space ABI definitions
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From:   Robin Murphy <robin.murphy@arm.com>
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Date:   Wed, 7 Feb 2018 12:38:50 +0000
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On 06/02/18 13:14, Hans Verkuil wrote:
[...]
> The one thing that I worry about is if these structs are the same for
> 32 and 64 bit arm.

I see some enums and bools in there - in general the storage size of 
those isn't even guaranteed to be consistent between different compiler 
implementations on the same platform, let alone across multiple 
platforms (especially WRT things like GCC's -fshort-enums).

In practice, under the standard ABIs for 32-bit and 64-bit Arm[1], I'd 
expect basic types other than longs and pointers to be pretty much the 
same; it's the imp-def C stuff I'd be a lot less confident about.

Robin.

[1]:http://infocenter.arm.com/help/topic/com.arm.doc.subset.swdev.abi/index.html