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 2DB46225797; Wed, 4 Dec 2024 17:03:02 +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=1733331783; cv=none; b=EQ4o2Jba3s/bazXCWfx0VN60TM9zsE20ksl49gK8p6ssa9fY86QxlIt1EmCe8yxvdOS9c2lV2jEWibc7C8+noVCQrtYdLmjDAUIRfbjtiqgDAeZIpeG+7A8xAE743XYxvrp39puY+zIh+4tVgHdLE8iF6nNHVEgeeHF7FJ+9g6g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733331783; c=relaxed/simple; bh=2GzttSpa/kaeonSAGg1jQW/Lt5L31GNe3I0m2S2UGNA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GLPWtAebYQY3tasUm3p8/5FA6H+vaE9mSJbmv39o9e59Ros/lTFObyuKCFQLg5XQBI/btqKuJ+Mpz/2s6EoZ6DS7jjnexDhnIsLLKN8XePfP6aHd64wPYu6b5k6+P91SK0QrSN3BhzvmY8nxlwtx6u3HvVKznkbH8FYDsDFwRCw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CUqHvUVL; 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="CUqHvUVL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D289DC4CED1; Wed, 4 Dec 2024 17:03:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733331782; bh=2GzttSpa/kaeonSAGg1jQW/Lt5L31GNe3I0m2S2UGNA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CUqHvUVLMpma1eJ03ZUePldeMCaWthlNjzubGIjE2HvQP+GGPGtHCELLQYOigsoT8 +9f21UnhCbRyv/3VtKD6e9+0jpsHPULPCVXruYMAFQpPQsQ0ixvgtd5hJj718YVH8G GzKNCG/tR+VopOLnqFe5FSD9dAk86aStoTzRKAZo8VwWqkXuyudenwQ9kQ5+65SkIB FhCgXcwy04h39Op6LtKFX8n+nCMJAFijyt7CU3bUwFIf1CzcIDGrA+zHi0/B3kwqrL 3ZHrbAiRB+cxiIKgK0FpneageOszrazK80HeOfiCIzgGLopHEpPfaA7WHAkvrKST3C PcxZurxBoB8bg== 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 5.15 2/9] tracing: Use atomic64_inc_return() in trace_clock_counter() Date: Wed, 4 Dec 2024 10:51:32 -0500 Message-ID: <20241204155141.2214748-2-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241204155141.2214748-1-sashal@kernel.org> References: <20241204155141.2214748-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.173 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