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-rw-r--r--arch/sparc/mm/tsb.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c
index 75a04c1a2383..f5edc28aa3a5 100644
--- a/arch/sparc/mm/tsb.c
+++ b/arch/sparc/mm/tsb.c
@@ -546,6 +546,9 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
mm->context.sparc64_ctx_val = 0UL;
+ mm->context.tag_store = NULL;
+ spin_lock_init(&mm->context.tag_lock);
+
#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
/* We reset them to zero because the fork() page copying
* will re-increment the counters as the parent PTEs are
@@ -611,4 +614,22 @@ void destroy_context(struct mm_struct *mm)
}
spin_unlock_irqrestore(&ctx_alloc_lock, flags);
+
+ /* If ADI tag storage was allocated for this task, free it */
+ if (mm->context.tag_store) {
+ tag_storage_desc_t *tag_desc;
+ unsigned long max_desc;
+ unsigned char *tags;
+
+ tag_desc = mm->context.tag_store;
+ max_desc = PAGE_SIZE/sizeof(tag_storage_desc_t);
+ for (i = 0; i < max_desc; i++) {
+ tags = tag_desc->tags;
+ tag_desc->tags = NULL;
+ kfree(tags);
+ tag_desc++;
+ }
+ kfree(mm->context.tag_store);
+ mm->context.tag_store = NULL;
+ }
}