From mboxrd@z Thu Jan 1 00:00:00 1970 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 979AF218DC6; Wed, 4 Dec 2024 17:03:46 +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=1733331826; cv=none; b=OD01RDaduPWTjpUgUziGUJICwbe/mzod3Egqw8PMmhpJ3Dfud7IIUXy2bf5mgkQJ7Mi8n/6xQrCnLQ1KV1XI2om0oJ6/S/kqGgMuc+ab91nsPjAhAXYtJ+5ZRiWcd4N+m5S7VPgDXsyfOCr2NUEWl0NH6GdREEPJ5q0NCZrb8XI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733331826; c=relaxed/simple; bh=2GzttSpa/kaeonSAGg1jQW/Lt5L31GNe3I0m2S2UGNA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=iaaggmyoM3s675xrcC9hPvhpHMMXIto/IDJ8lQOltjM8HkOzpxlPwgN5xMyfwfIeGGxL/f7r7Q+fOVqE2ZGS0auuU+o9ShZETjkcYoSSaBPX2IZZqjPWAx4XWHZdSl+DGHLJI2XSM/1NmNHv2UN4BBzBxZrpxt3EM9COaLTs7q0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kRj/lHdA; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kRj/lHdA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D441C4CECD; Wed, 4 Dec 2024 17:03:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733331826; bh=2GzttSpa/kaeonSAGg1jQW/Lt5L31GNe3I0m2S2UGNA=; h=From:To:Cc:Subject:Date:From; b=kRj/lHdA1mrREEWGHbI0GZDPO3A8k9yqDVUHHc9w5n1X+8p/f0M4mlblEyU9wy1zB LIG5UOzaN6o/RWHvY1dxrrhZwFAG3PNIiUNIMe6Q67QvLsT+goF+BCmLmsgF08Axst OzCopt4Z6YIaKLkNmps/7UBj4Qt9i+BozxIHDZ/RDSKbJWcIDJl+zyoAOwCA8JX3Zx 3TDzasH7rDdc17FEyHhwS0Hk3vvOLxHOdnuwJk7BGlUalWlZppBgOzHc1zFtDKiUtg XCgma1icATPiZqgTGzbwVoaW6aqqCz4n4QLg8ihMmD866EZ8pM2Ci0+A+oxemRWVyu GrsPxaJWSv2Jg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Uros Bizjak , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Sasha Levin , linux-trace-kernel@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 1/6] tracing: Use atomic64_inc_return() in trace_clock_counter() Date: Wed, 4 Dec 2024 10:52:20 -0500 Message-ID: <20241204155226.2215336-1-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 4.19.324 Content-Transfer-Encoding: 8bit From: Uros Bizjak [ Upstream commit eb887c4567d1b0e7684c026fe7df44afa96589e6 ] Use atomic64_inc_return(&ref) instead of atomic64_add_return(1, &ref) to use optimized implementation and ease register pressure around the primitive for targets that implement optimized variant. Cc: Steven Rostedt Cc: Masami Hiramatsu Cc: Mathieu Desnoyers Link: https://lore.kernel.org/20241007085651.48544-1-ubizjak@gmail.com Signed-off-by: Uros Bizjak Signed-off-by: Steven Rostedt (Google) Signed-off-by: Sasha Levin --- kernel/trace/trace_clock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace_clock.c b/kernel/trace/trace_clock.c index 4702efb00ff21..4cb2ebc439be6 100644 --- a/kernel/trace/trace_clock.c +++ b/kernel/trace/trace_clock.c @@ -154,5 +154,5 @@ static atomic64_t trace_counter; */ u64 notrace trace_clock_counter(void) { - return atomic64_add_return(1, &trace_counter); + return atomic64_inc_return(&trace_counter); } -- 2.43.0