vcs: invoke the vt update callback when /dev/vcs* is written to

A notifier chain is called whenever the vt code modifies a terminal content, except for one case which is when the modification comes through writes to /dev/vcs* devices. Let's add the missing notifier invocation at the end of vcs_write() for that case too. Signed-off-by: Nicolas Pitre <[email protected]> Cc: Alan Cox <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
mgowda · Oct 22, 2010 · 432c9ed · 432c9ed
1 parent 47725ac
commit 432c9ed
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diff --git a/drivers/char/vc_screen.c b/drivers/char/vc_screen.c
@@ -538,6 +538,8 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 	}
 	*ppos += written;
 	ret = written;
+	if (written)
+		vcs_scr_updated(vc);
 
 unlock_out:
 	release_console_sem();

diff --git a/drivers/char/vt.c b/drivers/char/vt.c
@@ -4182,6 +4182,11 @@ void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
 	}
 }
 
+void vcs_scr_updated(struct vc_data *vc)
+{
+	notify_update(vc);
+}
+
 /*
  *	Visible symbols for modules
  */

diff --git a/include/linux/selection.h b/include/linux/selection.h
@@ -39,5 +39,6 @@ extern void putconsxy(struct vc_data *vc, unsigned char *p);
 
 extern u16 vcs_scr_readw(struct vc_data *vc, const u16 *org);
 extern void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org);
+extern void vcs_scr_updated(struct vc_data *vc);
 
 #endif
-Original file line number
+Diff line change
@@ Expand Up @@
     	}
     }
+    void vcs_scr_updated(struct vc_data *vc)
+    {
+    	notify_update(vc);
+    }
     /*
      *	Visible symbols for modules
      */
@@ Expand Down @@