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-rw-r--r--arch/x86_64/kernel/smp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86_64/kernel/smp.c b/arch/x86_64/kernel/smp.c
index acee4bc..5a1c0a3 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))
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