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parisc: Optimize switch_mm
We only need to switch contexts when prev != next, and we don't need to disable interrupts to do the check. Signed-off-by: John David Anglin <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de>
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@ -63,6 +63,9 @@ static inline void switch_mm(struct mm_struct *prev,
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{
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unsigned long flags;
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if (prev == next)
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return;
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local_irq_save(flags);
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switch_mm_irqs_off(prev, next, tsk);
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local_irq_restore(flags);
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