diff --git a/[refs] b/[refs]
index 69ed61e3f019..d588ba615406 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f7899f7c1fff3c68f0c896e38714d489845cef57
+refs/heads/master: edd8a97e6e89ee2edc86e21db6253a73741f3c72
diff --git a/trunk/arch/blackfin/include/asm/mmu_context.h b/trunk/arch/blackfin/include/asm/mmu_context.h
index 3828c70e7a2e..15b16d3e8de8 100644
--- a/trunk/arch/blackfin/include/asm/mmu_context.h
+++ b/trunk/arch/blackfin/include/asm/mmu_context.h
@@ -30,8 +30,11 @@ extern void *l1sram_alloc_max(void*);
 static inline void free_l1stack(void)
 {
 	nr_l1stack_tasks--;
-	if (nr_l1stack_tasks == 0)
+	if (nr_l1stack_tasks == 0) {
 		l1sram_free(l1_stack_base);
+		l1_stack_base = NULL;
+		l1_stack_len = 0;
+	}
 }
 
 static inline unsigned long