From patchwork Mon Oct 21 15:08:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Andrzej Siewior X-Patchwork-Id: 13844322 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 EB77A1E7677; Mon, 21 Oct 2024 15:13:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729523590; cv=none; b=VcUQVDVG8se3ioYWe844CsxPhiAsbAj4chS6VX6Vv5vV8lJ7N5Ib8lujzFLpj2lx+EC2JNUoS4XgPR+PYp3slQ/w+F4rw5nyUN8cyW2mPDbNhUOsmuS9yQe7q/GfYMjVspUtxNWvvQilwAMYZiqwl5VUvMJSxzd8RPKUNuDxxk0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729523590; c=relaxed/simple; bh=5P2NQ2LTGqAw9tTdB+yi629BK+jCITFq2F+INjGiWE0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oU1aqxQ4M30/dLamIV26sXaDIQRnk/oUxmTPzpfLQ43MOsM2OIabf8bNTcKEEUjXADb1I5gAo8KY4Q3+ZBxiEXl1CDvIJ2I61MfbUwtZTHQfsVqOLAXl3ArfzJMswcuM9mcN0+p/aYQTL0JO4TnEpdpsh+htSjxjrsG5oSec6BY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=aqz0JA1e; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=Bt0EUuMo; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="aqz0JA1e"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Bt0EUuMo" From: Sebastian Andrzej Siewior DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1729523587; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4mJYXpgOv9Nb7Ka4YZwNzbNkv6qUKCXI6IA+AOiHpw0=; b=aqz0JA1e6EeyFYhZrVsWivhxlRtoaOJPvtOlZgPaez4aAgYGdKbf+VtkSIlB4x0yt630Qr 8KJuyBA5pIpIZa8ik9mXHddNUJFU68vUETZpzgUTPv+QaijhRp2+Bd5TnD2uVs+gBpo6Gr WqgkAWYXLwVxRTVvCTjo7n5MpytrngZyNnHhnPBZR+1PcsDagkpj3iNObLuhIya609Rs5h 3uHPkpHLZKUoJ/g2Yy2XAbn83lUFRXJ2G9yrLgHZoM2jPfhWox1Pjl+SdAeozWAyIr2MzL 18+ZCEpeBY6kcFuzGIgyQlpaG0ya5rjZc4PvkgUw6HB4aAaiToqFkd8WcwfiLA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1729523587; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4mJYXpgOv9Nb7Ka4YZwNzbNkv6qUKCXI6IA+AOiHpw0=; b=Bt0EUuMo3fNCd6WivN40VtziHpHTDLxPNT8znL9fd6ifNCCpdgyFgUGoMWN4sscs6wdb7Q K5fX91JEUfMNaKDw== To: linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Peter Zijlstra , tglx@linutronix.de, mingo@kernel.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, ankur.a.arora@oracle.com, efault@gmx.de, Masami Hiramatsu , Mathieu Desnoyers , Sebastian Andrzej Siewior Subject: [PATCH v2 1/3] tracing: Replace TRACE_FLAG_IRQS_NOSUPPORT with its config option. Date: Mon, 21 Oct 2024 17:08:40 +0200 Message-ID: <20241021151257.102296-2-bigeasy@linutronix.de> In-Reply-To: <20241021151257.102296-1-bigeasy@linutronix.de> References: <20241021151257.102296-1-bigeasy@linutronix.de> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Thomas Gleixner The TRACE_FLAG_IRQS_NOSUPPORT flag is used by tracing_gen_ctx.*() to signal that CONFIG_TRACE_IRQFLAGS_SUPPORT is not enabled and tracing IRQ flags is not supported. This could be replaced by using the 0 as flags and then deducting that there is no IRQFLAGS_SUPPORT based on the config option. The downside is that without CONFIG_TRACE_IRQFLAGS_SUPPORT we can not distinguish between no-IRQ passed flags and callers which passed 0. On the upside we have room for one additional flags which could be used for LAZY_PREEMPTION. Remove TRACE_FLAG_IRQS_NOSUPPORT and set it flags are 0 and CONFIG_TRACE_IRQFLAGS_SUPPORT is not set. [bigeasy: Commit descrption.] Signed-off-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior --- include/linux/trace_events.h | 7 +++---- kernel/trace/trace_output.c | 2 +- 2 files changed, 4 insertions(+), 5 deletions(-) --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -184,8 +184,7 @@ unsigned int tracing_gen_ctx_irq_test(un enum trace_flag_type { TRACE_FLAG_IRQS_OFF = 0x01, - TRACE_FLAG_IRQS_NOSUPPORT = 0x02, - TRACE_FLAG_NEED_RESCHED = 0x04, + TRACE_FLAG_NEED_RESCHED = 0x02, TRACE_FLAG_HARDIRQ = 0x08, TRACE_FLAG_SOFTIRQ = 0x10, TRACE_FLAG_PREEMPT_RESCHED = 0x20, @@ -211,11 +210,11 @@ static inline unsigned int tracing_gen_c static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags) { - return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT); + return tracing_gen_ctx_irq_test(0); } static inline unsigned int tracing_gen_ctx(void) { - return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT); + return tracing_gen_ctx_irq_test(0); } #endif --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -460,7 +460,7 @@ int trace_print_lat_fmt(struct trace_seq (entry->flags & TRACE_FLAG_IRQS_OFF && bh_off) ? 'D' : (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : bh_off ? 'b' : - (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : + !IS_ENABLED(CONFIG_TRACE_IRQFLAGS_SUPPORT) ? 'X' : '.'; switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |