[PATCH v3 2/3] arm64: Optimize __READ_ONCE() with CONFIG_LTO=y

[Will Deacon]

On Mon, Feb 02, 2026 at 05:01:39PM +0100, Peter Zijlstra wrote:
> On Mon, Feb 02, 2026 at 03:36:40PM +0000, Will Deacon wrote:
> 
> > Since we're not providing acquire semantics for the non-atomic case,
> > what we really want is the generic definition of __READ_ONCE() from
> > include/asm-generic/rwonce.h here. The header inclusion mess prevents
> > that, but why can't we just inline that definition here for the
> > 'default' case? If TYPEOF_UNQUAL() leads to better codegen, shouldn't
> > we use that to implement __unqual_scalar_typeof() when it is available?
> 
> We are?

Great! Then I don't grok why we need to choose between
__unqual_scalar_typeof() and __typeof_unqual__() in the arch code. We
should just use the former and it will DTRT.

Will