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parisc: Optimize switch_mm

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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>
This commit is contained in:
John David Anglin 2017-07-26 20:02:52 +02:00 committed by Helge Deller
parent 42593e7000
commit d2883fa1a6
1 changed files with 3 additions and 0 deletions
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3
arch/parisc/include/asm/mmu_context.h
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@ -63,6 +63,9 @@ static inline void switch_mm(struct mm_struct *prev,
{ {
unsigned long flags; unsigned long flags;
if (prev == next)
return;
local_irq_save(flags); local_irq_save(flags);
switch_mm_irqs_off(prev, next, tsk); switch_mm_irqs_off(prev, next, tsk);
local_irq_restore(flags); local_irq_restore(flags);