Re: [PATCH] security: use READ_ONCE instead of deprecated ACCESS_ONCE

From: David Howells
Date: Fri Feb 10 2017 - 06:23:08 EST

Davidlohr Bueso <dave@xxxxxxxxxxxx> wrote:

> With the new standardized functions, we can replace all ACCESS_ONCE()
> calls across relevant security/keyrings/.
> ACCESS_ONCE() does not work reliably on non-scalar types. For example
> gcc 4.6 and 4.7 might remove the volatile tag for such accesses during
> the SRA (scalar replacement of aggregates) step:
> Update the new calls regardless of if it is a scalar type, this is
> cleaner than having three alternatives.
> Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx>