1 files changed, 28 insertions, 0 deletions

diff --git a/arch/sparc64/mm/tsb.c b/arch/sparc64/mm/tsb.c
index 15e8af58b1d2..2f84cef6c1b5 100644
--- a/arch/sparc64/mm/tsb.c
+++ b/arch/sparc64/mm/tsb.c
@@ -8,6 +8,7 @@
 #include <asm/page.h>
 #include <asm/tlbflush.h>
 #include <asm/tlb.h>
+#include <asm/mmu_context.h>
 
 #define TSB_ENTRY_ALIGNMENT     16
 
@@ -82,3 +83,30 @@ void flush_tsb_user(struct mmu_gather *mp)
                 }
         }
 }
+
+int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+{
+        unsigned long page = get_zeroed_page(GFP_KERNEL);
+
+        mm->context.sparc64_ctx_val = 0UL;
+        if (unlikely(!page))
+                return -ENOMEM;
+
+        mm->context.sparc64_tsb = (unsigned long *) page;
+
+        return 0;
+}
+
+void destroy_context(struct mm_struct *mm)
+{
+        free_page((unsigned long) mm->context.sparc64_tsb);
+
+        spin_lock(&ctx_alloc_lock);
+
+        if (CTX_VALID(mm->context)) {
+                unsigned long nr = CTX_NRBITS(mm->context);
+                mmu_context_bmap[nr>>6] &= ~(1UL << (nr & 63));
+        }
+
+        spin_unlock(&ctx_alloc_lock);
+}