1 files changed, 29 insertions, 0 deletions

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 31211bfdc6d8..2a53943924b2 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -265,6 +265,35 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 }
 #endif
 
+#if THREAD_SHIFT < PAGE_SHIFT
+static struct kmem_cache *thread_info_cache;
+
+struct thread_info *alloc_thread_info(struct task_struct *tsk)
+{
+        struct thread_info *ti;
+
+        ti = kmem_cache_alloc(thread_info_cache, GFP_KERNEL);
+        if (unlikely(ti == NULL))
+                return NULL;
+#ifdef CONFIG_DEBUG_STACK_USAGE
+        memset(ti, 0, THREAD_SIZE);
+#endif
+        return ti;
+}
+
+void free_thread_info(struct thread_info *ti)
+{
+        kmem_cache_free(thread_info_cache, ti);
+}
+
+void thread_info_cache_init(void)
+{
+        thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,
+                                              THREAD_SIZE, 0, NULL);
+        BUG_ON(thread_info_cache == NULL);
+}
+#endif /* THREAD_SHIFT < PAGE_SHIFT */
+
 #ifdef CONFIG_MEMORY_HOTPLUG
 int arch_add_memory(int nid, u64 start, u64 size)
 {