From: Ihor Solodrai <ihor.solodrai@linux.dev>
To: Kumar Kartikeya Dwivedi <memxor@gmail.com>, bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Eduard Zingerman <eddyz87@gmail.com>,
Emil Tsalapatis <emil@etsalapatis.com>,
kkd@meta.com, kernel-team@meta.com
Subject: Re: [PATCH bpf-next v1 12/14] resolve_btfids: Drop KF_ARENA_ARG flag support
Date: Wed, 26 Aug 2026 13:47:45 -0700 [thread overview]
Message-ID: <d27b2aa8-7b88-4a82-bde4-23ac00a7c77e@linux.dev> (raw)
In-Reply-To: <20260821233516.3426127-13-memxor@gmail.com>
On 2026-08-21 4:35 p.m., Kumar Kartikeya Dwivedi wrote:
> Arena argument suffixes now describe the address-space contract at any
> parameter position, while the kernel no longer publishes KF_ARENA_ARG1
> or KF_ARENA_ARG2. Keeping private copies in resolve_btfids would leave an
> obsolete second annotation mechanism and silently accept flags the
> kernel no longer understands.
>
> Derive arena arguments exclusively from their suffixes and retain
> KF_ARENA_RET for functions returning arena pointers. Update the resolver
> selftest to distinguish return-only flags, unannotated pointer arguments,
> and suffix-annotated arguments.
>
> Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Assuming Eduard's point re selftest is going to be addressed:
Acked-by: Ihor Solodrai <ihor.solodrai@linux.dev>
> ---
> tools/bpf/resolve_btfids/main.c | 22 ++-----------------
> .../selftests/bpf/prog_tests/resolve_btfids.c | 22 ++++++-------------
> 2 files changed, 9 insertions(+), 35 deletions(-)
>
> [...]
next prev parent reply other threads:[~2026-08-26 20:47 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-21 23:34 [PATCH bpf-next v1 00/14] Retire KF_ARENA_ARG kfunc flags Kumar Kartikeya Dwivedi
2026-08-21 23:34 ` [PATCH bpf-next v1 01/14] bpf: Split arena kfunc and struct_ops JIT capabilities Kumar Kartikeya Dwivedi
2026-08-22 0:46 ` bot+bpf-ci
2026-08-24 22:28 ` Eduard Zingerman
2026-08-24 22:37 ` Kumar Kartikeya Dwivedi
2026-08-26 19:52 ` Ihor Solodrai
2026-08-21 23:34 ` [PATCH bpf-next v1 02/14] bpf, riscv: Fix stack-passed arguments for indirect trampolines Kumar Kartikeya Dwivedi
2026-08-24 6:21 ` Pu Lehui
2026-08-21 23:34 ` [PATCH bpf-next v1 03/14] bpf, riscv: JIT arena kfunc argument rebasing Kumar Kartikeya Dwivedi
2026-08-24 6:36 ` Pu Lehui
2026-08-21 23:34 ` [PATCH bpf-next v1 04/14] bpf, riscv: Convert struct_ops arena arguments in the trampoline Kumar Kartikeya Dwivedi
2026-08-21 23:44 ` sashiko-bot
2026-08-24 6:38 ` Pu Lehui
2026-08-21 23:34 ` [PATCH bpf-next v1 05/14] bpf, s390: JIT arena kfunc argument rebasing Kumar Kartikeya Dwivedi
2026-08-21 23:35 ` [PATCH bpf-next v1 06/14] bpf, s390: Convert struct_ops arena arguments Kumar Kartikeya Dwivedi
2026-08-22 0:46 ` bot+bpf-ci
2026-08-21 23:35 ` [PATCH bpf-next v1 07/14] bpf, loongarch: Fix stack arguments for indirect trampolines Kumar Kartikeya Dwivedi
2026-08-22 0:46 ` bot+bpf-ci
2026-08-21 23:35 ` [PATCH bpf-next v1 08/14] bpf, loongarch: JIT arena kfunc argument rebasing Kumar Kartikeya Dwivedi
2026-08-21 23:46 ` sashiko-bot
2026-08-21 23:35 ` [PATCH bpf-next v1 09/14] bpf, loongarch: Convert struct_ops arena arguments in trampolines Kumar Kartikeya Dwivedi
2026-08-21 23:51 ` sashiko-bot
2026-08-21 23:35 ` [PATCH bpf-next v1 10/14] bpf, powerpc: JIT arena kfunc argument rebasing Kumar Kartikeya Dwivedi
2026-08-22 0:46 ` bot+bpf-ci
2026-08-21 23:35 ` [PATCH bpf-next v1 11/14] bpf: Replace arena kfunc argument flags with suffixes Kumar Kartikeya Dwivedi
2026-08-21 23:58 ` sashiko-bot
2026-08-22 0:46 ` bot+bpf-ci
2026-08-24 22:15 ` Eduard Zingerman
2026-08-24 22:52 ` Kumar Kartikeya Dwivedi
2026-08-26 20:42 ` Ihor Solodrai
2026-08-21 23:35 ` [PATCH bpf-next v1 12/14] resolve_btfids: Drop KF_ARENA_ARG flag support Kumar Kartikeya Dwivedi
2026-08-22 0:46 ` bot+bpf-ci
2026-08-24 22:25 ` Eduard Zingerman
2026-08-24 22:53 ` Kumar Kartikeya Dwivedi
2026-08-26 20:47 ` Ihor Solodrai [this message]
2026-08-21 23:35 ` [PATCH bpf-next v1 13/14] selftests/bpf: Exercise arena arguments on every capable JIT Kumar Kartikeya Dwivedi
2026-08-22 0:46 ` bot+bpf-ci
2026-08-26 20:50 ` Ihor Solodrai
2026-08-21 23:35 ` [PATCH bpf-next v1 14/14] docs/bpf: Document split arena argument JIT capabilities Kumar Kartikeya Dwivedi
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