1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/fb.h b/include/linux/fb.h
index dd68358996b7..f847df9e99b6 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -819,6 +819,7 @@ struct fb_info {
         int node;
         int flags;
         struct mutex lock;              /* Lock for open/release/ioctl funcs */
+        struct mutex mm_lock;           /* Lock for fb_mmap and smem_* fields */
         struct fb_var_screeninfo var;   /* Current var */
         struct fb_fix_screeninfo fix;   /* Current fix */
         struct fb_monspecs monspecs;    /* Current Monitor specs */