1 files changed, 2 insertions, 1 deletions

diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index de7d048bd4ee..9124467651c4 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -395,7 +395,8 @@ void finish_atomic_sections (struct pt_regs *regs)
 #if defined(CONFIG_ACCESS_CHECK)
 int _access_ok(unsigned long addr, unsigned long size)
 {
-
+        if (size == 0)
+                return 1;
         if (addr > (addr + size))
                 return 0;
         if (segment_eq(get_fs(), KERNEL_DS))