1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86_64/kernel/smp.c b/arch/x86_64/kernel/smp.c
index acee4bc3f6fa..5a1c0a3bf872 100644
--- a/arch/x86_64/kernel/smp.c
+++ b/arch/x86_64/kernel/smp.c
@@ -135,10 +135,10 @@ asmlinkage void smp_invalidate_interrupt(struct pt_regs *regs)
 
         cpu = smp_processor_id();
         /*
-         * orig_rax contains the interrupt vector - 256.
+         * orig_rax contains the negated interrupt vector.
          * Use that to determine where the sender put the data.
          */
-        sender = regs->orig_rax + 256 - INVALIDATE_TLB_VECTOR_START;
+        sender = ~regs->orig_rax - INVALIDATE_TLB_VECTOR_START;
         f = &per_cpu(flush_state, sender);
 
         if (!cpu_isset(cpu, f->flush_cpumask))