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Diffstat (limited to 'include/asm-parisc/tlbflush.h')
-rw-r--r--include/asm-parisc/tlbflush.h16
1 files changed, 4 insertions, 12 deletions
diff --git a/include/asm-parisc/tlbflush.h b/include/asm-parisc/tlbflush.h
index e97aa8d..c9ec39c 100644
--- a/include/asm-parisc/tlbflush.h
+++ b/include/asm-parisc/tlbflush.h
@@ -12,21 +12,15 @@
* N class systems, only one PxTLB inter processor broadcast can be
* active at any one time on the Merced bus. This tlb purge
* synchronisation is fairly lightweight and harmless so we activate
- * it on all SMP systems not just the N class. */
-#ifdef CONFIG_SMP
+ * it on all SMP systems not just the N class. We also need to have
+ * preemption disabled on uniprocessor machines, and spin_lock does that
+ * nicely.
+ */
extern spinlock_t pa_tlb_lock;
#define purge_tlb_start(x) spin_lock(&pa_tlb_lock)
#define purge_tlb_end(x) spin_unlock(&pa_tlb_lock)
-#else
-
-#define purge_tlb_start(x) do { } while(0)
-#define purge_tlb_end(x) do { } while (0)
-
-#endif
-
-
extern void flush_tlb_all(void);
/*
@@ -88,7 +82,6 @@ static inline void flush_tlb_range(struct vm_area_struct *vma,
if (npages >= 512) /* 2MB of space: arbitrary, should be tuned */
flush_tlb_all();
else {
- preempt_disable();
mtsp(vma->vm_mm->context,1);
purge_tlb_start();
if (split_tlb) {
@@ -102,7 +95,6 @@ static inline void flush_tlb_range(struct vm_area_struct *vma,
pdtlb(start);
start += PAGE_SIZE;
}
- preempt_enable();
}
purge_tlb_end();
}
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