svn commit: r270343 - head/sys/dev/vt

[Jean-Sebastien Pedron]

Author: dumbbell
Date: Fri Aug 22 17:49:24 2014
New Revision: 270343
URL: http://svnweb.freebsd.org/changeset/base/270343

Log:
  vt(4): Remove "FIXME" about multiple locking of vt_buf in vt_flush()
  
  After some testing, it appears that acquiring the lock once and keeping
  it longer is slower than taking it multiple times.
  
  While here, fix a typo in another comment.
  
  MFC after:	1 week

Modified:
  head/sys/dev/vt/vt_core.c

Modified: head/sys/dev/vt/vt_core.c
==============================================================================
--- head/sys/dev/vt/vt_core.c	Fri Aug 22 17:09:31 2014	(r270342)
+++ head/sys/dev/vt/vt_core.c	Fri Aug 22 17:49:24 2014	(r270343)
@@ -428,7 +428,7 @@ vt_scroll(struct vt_window *vw, int offs
 
 	diff = vthistory_seek(&vw->vw_buf, offset, whence);
 	/*
-	 * Offset changed, please update Nth lines on sceen.
+	 * Offset changed, please update Nth lines on screen.
 	 * +N - Nth lines at top;
 	 * -N - Nth lines at bottom.
 	 */
@@ -903,12 +903,7 @@ vt_flush(struct vt_device *vd)
 	    !(vw->vw_flags & VWF_MOUSE_HIDE)) { /* Cursor displayed.      */
 		if (vd->vd_moldx != vd->vd_mx ||
 		    vd->vd_moldy != vd->vd_my) {
-			/*
-			 * Mark last mouse position as dirty to erase.
-			 *
-			 * FIXME: The vt_buf lock is acquired twice in a
-			 * row.
-			 */
+			/* Mark last mouse position as dirty to erase. */
 			vt_mark_mouse_position_as_dirty(vd,
 			    vd->vd_moldx, vd->vd_moldy);