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Diffstat (limited to 'arch/powerpc/mm/mmu_context_hash64.c')
-rw-r--r--arch/powerpc/mm/mmu_context_hash64.c26
1 files changed, 23 insertions, 3 deletions
diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c
index dbeb86ac90cd..b910d37aea1a 100644
--- a/arch/powerpc/mm/mmu_context_hash64.c
+++ b/arch/powerpc/mm/mmu_context_hash64.c
@@ -18,6 +18,7 @@
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <linux/idr.h>
+#include <linux/module.h>
#include <asm/mmu_context.h>
@@ -32,7 +33,7 @@ static DEFINE_IDR(mmu_context_idr);
#define NO_CONTEXT 0
#define MAX_CONTEXT ((1UL << 19) - 1)
-int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+int __init_new_context(void)
{
int index;
int err;
@@ -57,22 +58,41 @@ again:
return -ENOMEM;
}
+ return index;
+}
+EXPORT_SYMBOL_GPL(__init_new_context);
+
+int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+{
+ int index;
+
+ index = __init_new_context();
+ if (index < 0)
+ return index;
+
/* The old code would re-promote on fork, we don't do that
* when using slices as it could cause problem promoting slices
* that have been forced down to 4K
*/
if (slice_mm_new_context(mm))
slice_set_user_psize(mm, mmu_virtual_psize);
+ subpage_prot_init_new_context(mm);
mm->context.id = index;
return 0;
}
-void destroy_context(struct mm_struct *mm)
+void __destroy_context(int context_id)
{
spin_lock(&mmu_context_lock);
- idr_remove(&mmu_context_idr, mm->context.id);
+ idr_remove(&mmu_context_idr, context_id);
spin_unlock(&mmu_context_lock);
+}
+EXPORT_SYMBOL_GPL(__destroy_context);
+void destroy_context(struct mm_struct *mm)
+{
+ __destroy_context(mm->context.id);
+ subpage_prot_free(mm);
mm->context.id = NO_CONTEXT;
}