diff mbox series

x86/mce: Use lockdep to assert preemption is off in mcheck_cpu_init

Message ID 20230615144942.1020961-1-nik.borisov@suse.com
State New
Headers
Series x86/mce: Use lockdep to assert preemption is off in mcheck_cpu_init |

Commit Message

Nikolay Borisov June 15, 2023, 2:49 p.m. UTC 
  Instead of relying on a comment, use
lockdep_assert_preemption_disabled() as it issue a warning if preemption
is on.

mcheck_cpu_init is called from:

start_kernel
 check_bugs
   identify_boot_cpu
     identify_cpu
       mcheck_cpu_init

Which happens after lockdep_init() call in start_kernel().

Signed-off-by: Nikolay Borisov <nik.borisov@suse.com>
---
 arch/x86/kernel/cpu/mce/core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 2eec60f50057..5d945a1690d5 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -2126,12 +2126,12 @@  DEFINE_IDTENTRY_RAW(exc_machine_check)
 }
 #endif
 
-/*
- * Called for each booted CPU to set up machine checks.
- * Must be called with preempt off:
- */
+/* Called for each booted CPU to set up machine checks. */
 void mcheck_cpu_init(struct cpuinfo_x86 *c)
 {
+
+	lockdep_assert_preemption_disabled();
+
 	if (mca_cfg.disabled)
 		return;