Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc fix from David Miller:
"Sparc32 locking bug fix from Andreas Larsson"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc32: destroy_context() and switch_mm() needs to disable interrupts.
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index be65f03..5cbc96d 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -460,10 +460,12 @@
void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
struct task_struct *tsk)
{
+ unsigned long flags;
+
if (mm->context == NO_CONTEXT) {
- spin_lock(&srmmu_context_spinlock);
+ spin_lock_irqsave(&srmmu_context_spinlock, flags);
alloc_context(old_mm, mm);
- spin_unlock(&srmmu_context_spinlock);
+ spin_unlock_irqrestore(&srmmu_context_spinlock, flags);
srmmu_ctxd_set(&srmmu_context_table[mm->context], mm->pgd);
}
@@ -986,14 +988,15 @@
void destroy_context(struct mm_struct *mm)
{
+ unsigned long flags;
if (mm->context != NO_CONTEXT) {
flush_cache_mm(mm);
srmmu_ctxd_set(&srmmu_context_table[mm->context], srmmu_swapper_pg_dir);
flush_tlb_mm(mm);
- spin_lock(&srmmu_context_spinlock);
+ spin_lock_irqsave(&srmmu_context_spinlock, flags);
free_context(mm->context);
- spin_unlock(&srmmu_context_spinlock);
+ spin_unlock_irqrestore(&srmmu_context_spinlock, flags);
mm->context = NO_CONTEXT;
}
}