Merge branch 'sh/stable-updates'

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/fb.h b/include/linux/fb.h
index 818fe21257e8..31527e17076b 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -960,6 +960,21 @@ extern struct fb_info *registered_fb[FB_MAX];
 extern int num_registered_fb;
 extern struct class *fb_class;
 
+static inline int lock_fb_info(struct fb_info *info)
+{
+        mutex_lock(&info->lock);
+        if (!info->fbops) {
+                mutex_unlock(&info->lock);
+                return 0;
+        }
+        return 1;
+}
+
+static inline void unlock_fb_info(struct fb_info *info)
+{
+        mutex_unlock(&info->lock);
+}
+
 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
                                            u8 *src, u32 s_pitch, u32 height)
 {