Re: [PATCH v4 2/4] LoongArch: bpf: Advertise JIT support for kptr xchg inline

On Wed, Jul 29, 2026 at 10:30 AM Chenguang Zhao
<[email protected]> wrote:
>
> From: Chenguang Zhao <[email protected]>
>
> The BPF verifier can lower bpf_kptr_xchg() to BPF_XCHG when the JIT
> advertises ptr xchg support. With ordered amswap_db.* emission from the
> previous patch, declare that LoongArch bpf JIT supports this inlining.
>

Acked-by: Hengqi Chen <[email protected]>

> Signed-off-by: Chenguang Zhao <[email protected]>
> ---
>  arch/loongarch/net/bpf_jit.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c
> index 5417a5624327..686d333146ce 100644
> --- a/arch/loongarch/net/bpf_jit.c
> +++ b/arch/loongarch/net/bpf_jit.c
> @@ -2396,6 +2396,11 @@ bool bpf_jit_supports_fsession(void)
>         return true;
>  }
>
> +bool bpf_jit_supports_ptr_xchg(void)
> +{
> +       return true;
> +}
> +
>  /* Indicate the JIT backend supports mixing bpf2bpf and tailcalls. */
>  bool bpf_jit_supports_subprog_tailcalls(void)
>  {
> --
> 2.25.1
>