On Wed, 16 Jul 2025 15:35:16 -0700
Alexei Starovoitov [off-list ref] wrote:

4.
Maybe we should extend clang/gcc to support attr(preserve_access_index)
on x86 and other architectures ;)
We rely heavily on it in bpf backend.
Then one can simply write:

struct rq___my {
  unsigned int nr_pinned;
} __attribute__((preserve_access_index));

struct rq___my *rq;

rq = this_rq();
rq->nr_pinned++;

and the compiler will do its magic of offset adjustment.
That's how BPF CORE works.

GNU Cauldron in Porto, Portugal is having a kernel track (hopefully if it
gets accepted). I highly recommend you attending and recommending these
features. It's happening two days after Kernel Recipes (I already booked my
plane tickets).

 https://gcc.gnu.org/wiki/cauldron2025

Peter, maybe you can attend too?

-- Steve