x86: iommu_sac_force can become static
The iommu_sac_force variable is needlessly defined global, and this patch makes it static. Additionally, this variable needs not be explicitly initialized. Signed-off-by: NDmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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