[PATCH v2 05/11] arm64: sve: Provide a conditional update accessor for ZCR_ELx

[Mark Brown]

On Fri, Mar 19, 2021 at 04:51:46PM +0000, Marc Zyngier wrote:
> On 2021-03-19 16:42, Mark Brown wrote:

> > Do compilers actually do much better with this than with a static
> > inline like the other functions in this header?  Seems like something
> > they should be figuring out.

> It's not about performance or anything of the sort: in most cases
> where we end-up using this, it is on the back of an exception.
> So performance is the least of our worries.

> However, the "reg" parameter to read/write_sysreg_s() cannot
> be a variable, because it is directly fed to the assembler.
> If you want to use functions, you need to specialise them per
> register. At this point, I'm pretty happy with a #define.

Ah, that makes sense - it was more of a "that's weird" than "that's
actually a problem", hence the Reviwed-by.
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