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MFC r270299 (dumbbell): vt_vga: When clearing video memory, don't read from it
authoremaste <emaste@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Thu, 4 Sep 2014 19:22:01 +0000 (19:22 +0000)
committeremaste <emaste@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Thu, 4 Sep 2014 19:22:01 +0000 (19:22 +0000)
commite06c8f66b1aa27cd70f049b8692a8cdc324cd7ea
tree28bfe9608e7f2e28d8f9d4af9514fb9f6d8019c9tree | snapshot
parenta1a9054796d7e380ec3822499f912fcb8ef38005commit | diff
MFC r270299 (dumbbell): vt_vga: When clearing video memory, don't read from it

  The goal is to clear the video memory, in case an application drew to
  it. So the content shouldn't be loaded in the latches, it can't be
  trusted anyway.

  This improves a bit the window switch speed.

Sponsored by: The FreeBSD Foundation

git-svn-id: svn://svn.freebsd.org/base/stable/10@271121 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
sys/dev/vt/hw/vga/vt_vga.c diff | blob | history
10-STABLE