[V2,17/38] x86/xen/hvm: Get rid of DEAD_FROZEN handling

Commit Message

Thomas Gleixner May 4, 2023, 7:02 p.m. UTC

From: Thomas Gleixner <[e-mail]>

No point in this conditional voodoo. Un-initializing the lock mechanism is
safe to be called unconditionally even if it was already invoked when the
CPU died.

Remove the invocation of xen_smp_intr_free() as that has been already
cleaned up in xen_cpu_dead_hvm().

Signed-off-by: Thomas Gleixner <[e-mail]>
Cc: Juergen Gross <[e-mail]>
Cc: Boris Ostrovsky <[e-mail]>
Cc: [e-mail]

---
 arch/x86/xen/enlighten_hvm.c |   11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)
---

Patch

--- a/arch/x86/xen/enlighten_hvm.c
+++ b/arch/x86/xen/enlighten_hvm.c
@@ -161,13 +161,12 @@  static int xen_cpu_up_prepare_hvm(unsign
 	int rc = 0;
 
 	/*
-	 * This can happen if CPU was offlined earlier and
-	 * offlining timed out in common_cpu_die().
+	 * If a CPU was offlined earlier and offlining timed out then the
+	 * lock mechanism is still initialized. Uninit it unconditionally
+	 * as it's safe to call even if already uninited. Interrupts and
+	 * timer have already been handled in xen_cpu_dead_hvm().
 	 */
-	if (cpu_report_state(cpu) == CPU_DEAD_FROZEN) {
-		xen_smp_intr_free(cpu);
-		xen_uninit_lock_cpu(cpu);
-	}
+	xen_uninit_lock_cpu(cpu);
 
 	if (cpu_acpi_id(cpu) != U32_MAX)
 		per_cpu(xen_vcpu_id, cpu) = cpu_acpi_id(cpu);