Re: [PATCH] mod_devicetable.h: reduce sizeof(struct of_device_id) by 80 bytes

[Enrico Weigelt, metux IT consult]

On 25.04.19 22:31, Rasmus Villemoes wrote:

Hi,

> A typical kernel image has hundreds of static struct of_device_id
> instances (a lot of which are sentinel all-zeroes), each occupying
> ~200 bytes. Nobody initializes the .compatible member with strings
> anywhere near 128 bytes, so a lot of that memory is simply wasted.

I just wonder whether it has to be a fixed size array at all, instead
of an const char* pointer. Using a pointer should, IMHO, offer even
more savings while not having the size limit at all.

Is that struct copied as-is somewhere ?


--mtx

-- 
Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
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