blackfin: restore L1 base address and length

Restore L1 base address and length to 0 after free else the value will be
wrong.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/blackfin/include/asm/mmu_context.h b/arch/blackfin/include/asm/mmu_context.h
index 3828c70e7a2..15b16d3e8de 100644
--- a/arch/blackfin/include/asm/mmu_context.h
+++ b/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