ARM: 9213/1: Print message about disabled Spectre workarounds only once

BugLink: https://bugs.launchpad.net/bugs/1988351
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@vger.kernel.org
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/arch/arm/mm/proc-v7-bugs.c b/arch/arm/mm/proc-v7-bugs.c
index fb9f3eb6bf483d22041a06fc9eb17bdf87866558..f9730eba063285727328b7c1347a3632a6442c09 100644 (file)
--- a/arch/arm/mm/proc-v7-bugs.c
+++ b/arch/arm/mm/proc-v7-bugs.c
@@ -108,8 +108,7 @@ static unsigned int spectre_v2_install_workaround(unsigned int method)
 #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;
 }