RE: [PATCH v5 1/5] x86/asm: Carve out a generic movdir64b() helper for general usage

[David Laight]

> > No, that just says the asm uses the value of the pointer.
> > Not what it points to.
> 
> Err, no, it is *exactly* what it points to that is important here and
> you're telling the compiler that the instruction will read that much
> memory through the pointer.

You need to use an "m" constraint for that.
A 'register' constraint just requires the value of the address
to be valid.

Look at the asm output from the example code I posted.

	David

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