linux-kernel - [tip: sched/urgent] x86, sched: Move check for CPU type to caller function

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Message-ID: <158759044762.28353.12681151703116026868.tip-bot2@tip-bot2>
Date:   Wed, 22 Apr 2020 21:20:47 -0000
From:   "tip-bot2 for Giovanni Gherdovich" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Giovanni Gherdovich <ggherdovich@...e.cz>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [tip: sched/urgent] x86, sched: Move check for CPU type to caller function

The following commit has been merged into the sched/urgent branch of tip:

Commit-ID:     db441bd9f630329c402d5cdd319f11bfcf509fb6
Gitweb:        https://git.kernel.org/tip/db441bd9f630329c402d5cdd319f11bfcf509fb6
Author:        Giovanni Gherdovich <ggherdovich@...e.cz>
AuthorDate:    Thu, 16 Apr 2020 07:47:45 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 22 Apr 2020 23:10:13 +02:00

x86, sched: Move check for CPU type to caller function

Improve readability of the function intel_set_max_freq_ratio() by moving
the check for KNL CPUs there, together with checks for GLM and SKX.

Signed-off-by: Giovanni Gherdovich <ggherdovich@...e.cz>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Link: https://lkml.kernel.org/r/20200416054745.740-5-ggherdovich@suse.cz
---
 arch/x86/kernel/smpboot.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index dd8e15f..8c89e4d 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1877,9 +1877,6 @@ static bool knl_set_max_freq_ratio(u64 *base_freq, u64 *turbo_freq,
 	int err, i;
 	u64 msr;
 
-	if (!x86_match_cpu(has_knl_turbo_ratio_limits))
-		return false;
-
 	err = rdmsrl_safe(MSR_PLATFORM_INFO, base_freq);
 	if (err)
 		return false;
@@ -1977,7 +1974,8 @@ static bool intel_set_max_freq_ratio(void)
 	    skx_set_max_freq_ratio(&base_freq, &turbo_freq, 1))
 		goto out;
 
-	if (knl_set_max_freq_ratio(&base_freq, &turbo_freq, 1))
+	if (x86_match_cpu(has_knl_turbo_ratio_limits) &&
+	    knl_set_max_freq_ratio(&base_freq, &turbo_freq, 1))
 		goto out;
 
 	if (x86_match_cpu(has_skx_turbo_ratio_limits) &&