RE: [PATCH v2 02/10] netfilter: Avoid assigning 'const' pointer to non-const pointer

David Laight
2020-01-27T12:21:11Z

From: Linus Torvalds
> Sent: 24 January 2020 17:37
...
> (That also means that the compiler can't necessarily even optimize
> multiple accesses through a const pointer away, because the object
> might be modified through another pointer that aliases the const one -
> you'd need to also mark it "restrict" to tell the compiler that no
> other pointer will alias).

I've seen gcc cache a value read through a 'const' parameter pointer
across a function call.
Can't remember which version though.

David

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