linux-kernel - [tip: x86/microcode] x86/microcode: Remove unnecessary perf callback

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Message-ID: <165398248772.4207.14917659484682510526.tip-bot2@tip-bot2>
Date:   Tue, 31 May 2022 07:34:47 -0000
From:   "tip-bot2 for Borislav Petkov" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Borislav Petkov <bp@...e.de>, Thomas Gleixner <tglx@...utronix.de>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/microcode] x86/microcode: Remove unnecessary perf callback

The following commit has been merged into the x86/microcode branch of tip:

Commit-ID:     0c0fe08c76485fe0178ebb0fa1a2052c727abe94
Gitweb:        https://git.kernel.org/tip/0c0fe08c76485fe0178ebb0fa1a2052c727abe94
Author:        Borislav Petkov <bp@...e.de>
AuthorDate:    Wed, 25 May 2022 18:12:32 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Tue, 31 May 2022 09:31:19 +02:00

x86/microcode: Remove unnecessary perf callback

c93dc84cbe32 ("perf/x86: Add a microcode revision check for SNB-PEBS")
checks whether the microcode revision has fixed PEBS issues.

This can happen either:

1. At PEBS init time, where the early microcode has been loaded already

2. During late loading, in the microcode_check() callback.

So remove the unnecessary call in the microcode loader init routine.

Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/r/20220525161232.14924-5-bp@alien8.de

---
 arch/x86/kernel/cpu/microcode/core.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 801b44a..ad57e0e 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -756,10 +756,7 @@ static int __init microcode_init(void)
 
 	cpus_read_lock();
 	mutex_lock(&microcode_mutex);
-
 	error = subsys_interface_register(&mc_cpu_interface);
-	if (!error)
-		perf_check_microcode();
 	mutex_unlock(&microcode_mutex);
 	cpus_read_unlock();