4 files changed, 7 insertions, 2 deletions

diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c
index c27e153d8882..070f26f0bf99 100644
--- a/drivers/video/fb_defio.c
+++ b/drivers/video/fb_defio.c
@@ -107,6 +107,10 @@ static int fb_deferred_io_mkwrite(struct vm_area_struct *vma,
         /* protect against the workqueue changing the page list */
         mutex_lock(&fbdefio->lock);
 
+        /* first write in this cycle, notify the driver */
+        if (fbdefio->first_io && list_empty(&fbdefio->pagelist))
+                fbdefio->first_io(info);
+
         /*
          * We want the page to remain locked from ->page_mkwrite until
          * the PTE is marked dirty to avoid page_mkclean() being called
diff --git a/drivers/video/smscufx.c b/drivers/video/smscufx.c
index ccbfef5e828f..99857857f6fa 100644
--- a/drivers/video/smscufx.c
+++ b/drivers/video/smscufx.c
@@ -1083,7 +1083,7 @@ static int ufx_ops_open(struct fb_info *info, int user)
 
                 struct fb_deferred_io *fbdefio;
 
-                fbdefio = kmalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
+                fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
 
                 if (fbdefio) {
                         fbdefio->delay = UFX_DEFIO_WRITE_DELAY;
diff --git a/drivers/video/udlfb.c b/drivers/video/udlfb.c
index a159b63e18b9..e9d43b403432 100644
--- a/drivers/video/udlfb.c
+++ b/drivers/video/udlfb.c
@@ -893,7 +893,7 @@ static int dlfb_ops_open(struct fb_info *info, int user)
 
                 struct fb_deferred_io *fbdefio;
 
-                fbdefio = kmalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
+                fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
 
                 if (fbdefio) {
                         fbdefio->delay = DL_DEFIO_WRITE_DELAY;
diff --git a/include/linux/fb.h b/include/linux/fb.h
index d31cb682e173..c10e71efb8f5 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -607,6 +607,7 @@ struct fb_deferred_io {
         struct mutex lock; /* mutex that protects the page list */
         struct list_head pagelist; /* list of touched pages */
         /* callback */
+        void (*first_io)(struct fb_info *info);
         void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
 };
 #endif