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Subject[tip: x86/apic] x86/apic: Make TSC deadline timer detection message visible
The following commit has been merged into the x86/apic branch of tip:

Commit-ID: de308d1815c9e8fe602a958c5c76142ff6501d75
Author: Borislav Petkov <>
AuthorDate: Mon, 25 May 2020 12:38:39 +02:00
Committer: Borislav Petkov <>
CommitterDate: Tue, 26 May 2020 10:54:18 +02:00

x86/apic: Make TSC deadline timer detection message visible

The commit

c84cb3735fd5 ("x86/apic: Move TSC deadline timer debug printk")

removed the message which said that the deadline timer was enabled.
It added a pr_debug() message which is issued when deadline timer
validation succeeds.

Well, issued only when CONFIG_DYNAMIC_DEBUG is enabled - otherwise
pr_debug() calls get optimized away if DEBUG is not defined in the
compilation unit.

Therefore, make the above message pr_info() so that it is visible in

Signed-off-by: Borislav Petkov <>
arch/x86/kernel/apic/apic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index e53dda2..21d2f1d 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2093,7 +2093,7 @@ void __init init_apic_mappings(void)
unsigned int new_apicid;

if (apic_validate_deadline_timer())
- pr_debug("TSC deadline timer available\n");
+ pr_info("TSC deadline timer available\n");

if (x2apic_mode) {
boot_cpu_physical_apicid = read_apic_id();
 \ /
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