linux-kernel - [PATCH 4.9 05/28] ARM: 9213/1: Print message about disabled Spectre workarounds only once

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Message-Id: <20220719114457.041638750@linuxfoundation.org>
Date:   Tue, 19 Jul 2022 13:53:43 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Dmitry Osipenko <dmitry.osipenko@...labora.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Subject: [PATCH 4.9 05/28] ARM: 9213/1: Print message about disabled Spectre workarounds only once

From: Dmitry Osipenko <dmitry.osipenko@...labora.com>

commit e4ced82deb5fb17222fb82e092c3f8311955b585 upstream.

Print the message about disabled Spectre workarounds only once. The
message is printed each time CPU goes out from idling state on NVIDIA
Tegra boards, causing storm in KMSG that makes system unusable.

Cc: stable@...r.kernel.org
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/arm/mm/proc-v7-bugs.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/arch/arm/mm/proc-v7-bugs.c
+++ b/arch/arm/mm/proc-v7-bugs.c
@@ -110,8 +110,7 @@ static unsigned int spectre_v2_install_w
 #else
 static unsigned int spectre_v2_install_workaround(unsigned int method)
 {
-	pr_info("CPU%u: Spectre V2: workarounds disabled by configuration\n",
-		smp_processor_id());
+	pr_info_once("Spectre V2: workarounds disabled by configuration\n");
 
 	return SPECTRE_VULNERABLE;
 }