From nobody Wed Nov 27 17:29:15 2024 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E79EE197543 for ; Wed, 9 Oct 2024 13:21:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728480074; cv=none; b=HIANU86y/fIXIW8SQ8moR5fYTRpam4cI0NRaps+2vA1VoC+mQuEWwS/OoZsd+ItxW7PpxRya2TqDKhRT0YxgZ7XMF8/H2QsmpPl9sruNg0qojiMwh0TlWf9ikNqbFHHY5ZLlrirDtQLRgZotkzrlKW+/Twk2Sbaka/EQsJJ3GBM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728480074; c=relaxed/simple; bh=APkbll3Cn3bSBzpnJAtnUN00YesvVOHPz6J4si+Z9gA=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=sbkQi41gqjirbiJhvhV7Am2cVGyXpxos9tTrREaJ8iQNhnkS51f0A2tcjfeipi4w3lF+IzZ/IndqCPr40yFJaGbJwyHOX4FEhhcxTVh205sRO7GxQUsBsYwiyGzpYfxEORkaX4aH3QNNEw3MuRn2ddpum4T+UkNjBO85F3lK5js= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id B930CC4CEC5; Wed, 9 Oct 2024 13:21:14 +0000 (UTC) Received: from rostedt by gandalf with local (Exim 4.98) (envelope-from ) id 1syWcy-0000000177J-1AwM; Wed, 09 Oct 2024 09:21:20 -0400 Message-ID: <20241009132120.141894926@goodmis.org> User-Agent: quilt/0.68 Date: Wed, 09 Oct 2024 09:21:08 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Alice Ryhl , Josh Poimboeuf Subject: [for-next][PATCH 4/6] tracepoints: Use new static branch API References: <20241009132104.470687911@goodmis.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Josh Poimboeuf The old static key API is deprecated. Switch to the new one. Cc: Masami Hiramatsu Cc: Mathieu Desnoyers Cc: Alice Ryhl Link: https://lore.kernel.org/7a08dae3c5eddb14b13864923c1b58ac1f4af83c.1728= 414936.git.jpoimboe@kernel.org Signed-off-by: Josh Poimboeuf Signed-off-by: Steven Rostedt (Google) --- include/linux/tracepoint-defs.h | 4 ++-- include/linux/tracepoint.h | 8 ++++---- kernel/trace/trace_events_hist.c | 2 +- kernel/trace/trace_events_user.c | 4 ++-- kernel/tracepoint.c | 4 ++-- 5 files changed, 11 insertions(+), 11 deletions(-) diff --git a/include/linux/tracepoint-defs.h b/include/linux/tracepoint-def= s.h index 4dc4955f0fbf..60a6e8314d4c 100644 --- a/include/linux/tracepoint-defs.h +++ b/include/linux/tracepoint-defs.h @@ -31,7 +31,7 @@ struct tracepoint_func { =20 struct tracepoint { const char *name; /* Tracepoint name */ - struct static_key key; + struct static_key_false key; struct static_call_key *static_call_key; void *static_call_tramp; void *iterator; @@ -83,7 +83,7 @@ struct bpf_raw_event_map { =20 #ifdef CONFIG_TRACEPOINTS # define tracepoint_enabled(tp) \ - static_key_false(&(__tracepoint_##tp).key) + static_branch_unlikely(&(__tracepoint_##tp).key) #else # define tracepoint_enabled(tracepoint) false #endif diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index 93a9f3070b48..2a29334bbc02 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -248,7 +248,7 @@ static inline struct tracepoint *tracepoint_ptr_deref(t= racepoint_ptr_t *p) #define __DECLARE_TRACE_RCU(name, proto, args, cond) \ static inline void trace_##name##_rcuidle(proto) \ { \ - if (static_key_false(&__tracepoint_##name.key)) \ + if (static_branch_unlikely(&__tracepoint_##name.key)) \ __DO_TRACE(name, \ TP_ARGS(args), \ TP_CONDITION(cond), 1); \ @@ -274,7 +274,7 @@ static inline struct tracepoint *tracepoint_ptr_deref(t= racepoint_ptr_t *p) extern struct tracepoint __tracepoint_##name; \ static inline void trace_##name(proto) \ { \ - if (static_key_false(&__tracepoint_##name.key)) \ + if (static_branch_unlikely(&__tracepoint_##name.key)) \ __DO_TRACE(name, \ TP_ARGS(args), \ TP_CONDITION(cond), 0); \ @@ -311,7 +311,7 @@ static inline struct tracepoint *tracepoint_ptr_deref(t= racepoint_ptr_t *p) static inline bool \ trace_##name##_enabled(void) \ { \ - return static_key_false(&__tracepoint_##name.key); \ + return static_branch_unlikely(&__tracepoint_##name.key);\ } =20 /* @@ -328,7 +328,7 @@ static inline struct tracepoint *tracepoint_ptr_deref(t= racepoint_ptr_t *p) struct tracepoint __tracepoint_##_name __used \ __section("__tracepoints") =3D { \ .name =3D __tpstrtab_##_name, \ - .key =3D STATIC_KEY_INIT_FALSE, \ + .key =3D STATIC_KEY_FALSE_INIT, \ .static_call_key =3D &STATIC_CALL_KEY(tp_func_##_name), \ .static_call_tramp =3D STATIC_CALL_TRAMP_ADDR(tp_func_##_name), \ .iterator =3D &__traceiter_##_name, \ diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_h= ist.c index 5f9119eb7c67..cc2924ad32a3 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -822,7 +822,7 @@ static inline void trace_synth(struct synth_event *even= t, u64 *var_ref_vals, { struct tracepoint *tp =3D event->tp; =20 - if (unlikely(atomic_read(&tp->key.enabled) > 0)) { + if (unlikely(static_key_enabled(&tp->key))) { struct tracepoint_func *probe_func_ptr; synth_probe_func_t probe_func; void *__data; diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_u= ser.c index 42b0d998d103..17bcad8f79de 100644 --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -1676,7 +1676,7 @@ static void update_enable_bit_for(struct user_event *= user) struct tracepoint *tp =3D &user->tracepoint; char status =3D 0; =20 - if (atomic_read(&tp->key.enabled) > 0) { + if (static_key_enabled(&tp->key)) { struct tracepoint_func *probe_func_ptr; user_event_func_t probe_func; =20 @@ -2280,7 +2280,7 @@ static ssize_t user_events_write_core(struct file *fi= le, struct iov_iter *i) * It's possible key.enabled disables after this check, however * we don't mind if a few events are included in this condition. */ - if (likely(atomic_read(&tp->key.enabled) > 0)) { + if (likely(static_key_enabled(&tp->key))) { struct tracepoint_func *probe_func_ptr; user_event_func_t probe_func; struct iov_iter copy; diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c index 8879da16ef4d..1e3de77ea6b3 100644 --- a/kernel/tracepoint.c +++ b/kernel/tracepoint.c @@ -358,7 +358,7 @@ static int tracepoint_add_func(struct tracepoint *tp, tracepoint_update_call(tp, tp_funcs); /* Both iterator and static call handle NULL tp->funcs */ rcu_assign_pointer(tp->funcs, tp_funcs); - static_key_enable(&tp->key); + static_branch_enable(&tp->key); break; case TP_FUNC_2: /* 1->2 */ /* Set iterator static call */ @@ -414,7 +414,7 @@ static int tracepoint_remove_func(struct tracepoint *tp, if (tp->unregfunc && static_key_enabled(&tp->key)) tp->unregfunc(); =20 - static_key_disable(&tp->key); + static_branch_disable(&tp->key); /* Set iterator static call */ tracepoint_update_call(tp, tp_funcs); /* Both iterator and static call handle NULL tp->funcs */ --=20 2.45.2