From patchwork Mon Aug 26 21:13:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 823840 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 7B53919DF4D; Mon, 26 Aug 2024 21:14:12 +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=1724706852; cv=none; b=Pr3MAdWUUjUhKOzkOiSBlUCI4qaUaDI19R/cjtF78Qd5gN3NZvqvk96qYWy4kGAvYzUUAaoGfb9XqLCRgZ5P8igb7sxx+eBOsYu+is0xLAhuSFYiJJ+DNcZqcG4HZd7+nogst61Kyj7jfaI3MHAV+QyZqgzmQoEnTaTeYtsDivE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724706852; c=relaxed/simple; bh=uLtdEH/FuQxQoDClWlfBImx0hkxxg7PVSYyuZWqCLZQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jhv49XxGb+44HLRdy8iqFesLcSDHm8BcVwAJA5mUfNyHxd1ZM43ocifSyDot3dtPih25MQxDbcdPWjWGyNaI/zN/FvbBCE2Jcz6To0OiEBUxuA+WgNeEnXbR3jMQyZvl4xJVQ0tAFYy6Kzc/lpskdWAf9sGFNmMTFIaFhsTCYoU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eRTI9ZHS; 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="eRTI9ZHS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0DEF7C4FEFE; Mon, 26 Aug 2024 21:14:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724706852; bh=uLtdEH/FuQxQoDClWlfBImx0hkxxg7PVSYyuZWqCLZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eRTI9ZHSQtN2H62kv6KB/C9fMM7rki5eqT87/BDTgc+xuc5wdC0Mgst6I6gyj0jo9 UF9Hdn3TlXpNucJhr9KKw5NVNGK7clp14ndv4v39vKx+mWmwhY+uKUem7+QyBkZg3K HcLR/YE3cFAdfUkGpcOpr3v6b3NvLj9IkOLwsL/Ffyh8Pio8jOyi4soqjAa4jFl3Dz GhZnueHT1ekUyr4wbsNEvzYWSXy+GwNuh572D/X8wXvXSC1fu9kiMNA2UU5As5ZvZR /2C/EHjn6ELfqx3OmubqIlHFLQZcQu0SykDBVtqOHXUx/H3PA+YYu7a91oKle6PtIr CxOjlo2T+ZJOA== From: Mario Limonciello To: Borislav Petkov , "Gautham R . Shenoy" , Perry Yuan Cc: x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "Rafael J . Wysocki" , linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)), linux-acpi@vger.kernel.org (open list:ACPI), linux-pm@vger.kernel.org (open list:CPU FREQUENCY SCALING FRAMEWORK), Mario Limonciello Subject: [PATCH 7/8] cpufreq: amd-pstate: Optimize amd_pstate_update_limits() Date: Mon, 26 Aug 2024 16:13:57 -0500 Message-ID: <20240826211358.2694603-8-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240826211358.2694603-1-superm1@kernel.org> References: <20240826211358.2694603-1-superm1@kernel.org> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Mario Limonciello Don't take and release the mutex when prefcore isn't present and avoid initialization of variables that will be initially set in the function. Signed-off-by: Mario Limonciello --- drivers/cpufreq/amd-pstate.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 75568d0f84623..ed05d7a0add10 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -798,17 +798,17 @@ static void amd_pstate_update_limits(unsigned int cpu) int ret; bool highest_perf_changed = false; - mutex_lock(&amd_pstate_driver_lock); - if ((!amd_pstate_prefcore) || (!cpudata->hw_prefcore)) - goto free_cpufreq_put; + if (!amd_pstate_prefcore) + return; + mutex_lock(&amd_pstate_driver_lock); ret = amd_get_highest_perf(cpu, &cur_high); if (ret) goto free_cpufreq_put; prev_high = READ_ONCE(cpudata->prefcore_ranking); - if (prev_high != cur_high) { - highest_perf_changed = true; + highest_perf_changed = (prev_high != cur_high); + if (highest_perf_changed) { WRITE_ONCE(cpudata->prefcore_ranking, cur_high); if (cur_high < CPPC_MAX_PERF)