diff mbox

parisc: Optimize switch_mm

Message ID 16F63B59-7A36-48F0-A5C7-670CA2ED9DED@bell.net (mailing list archive)
State Superseded
Headers show

Commit Message

John David Anglin July 25, 2017, 9:31 p.m. UTC 
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>

--
John David Anglin	dave.anglin@bell.net
diff mbox

Patch

diff --git a/arch/parisc/include/asm/mmu_context.h b/arch/parisc/include/asm/mmu_context.h
index a81226257878..b1dc6e3f0dd0 100644
--- a/arch/parisc/include/asm/mmu_context.h
+++ b/arch/parisc/include/asm/mmu_context.h
@@ -49,26 +49,19 @@  static inline void load_context(mm_context_t context)
 	mtctl(__space_to_prot(context), 8);
 }
 
-static inline void switch_mm_irqs_off(struct mm_struct *prev,
+static inline void switch_mm(struct mm_struct *prev,
 		struct mm_struct *next, struct task_struct *tsk)
 {
+	unsigned long flags;
+
 	if (prev != next) {
+		local_irq_save(flags);
 		mtctl(__pa(next->pgd), 25);
 		load_context(next->context);
+		local_irq_restore(flags);
 	}
 }
 
-static inline void switch_mm(struct mm_struct *prev,
-		struct mm_struct *next, struct task_struct *tsk)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-	switch_mm_irqs_off(prev, next, tsk);
-	local_irq_restore(flags);
-}
-#define switch_mm_irqs_off switch_mm_irqs_off
-
 #define deactivate_mm(tsk,mm)	do { } while (0)
 
 static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)