[PATCH] shadow: Optimize shadowUpdatePacked(). (#26973)

[Matt Turner]

From: Adam Jackson <ajax at redhat.com>

Signed-off-by: Matt Turner <mattst88 at gmail.com>
---
I was bug triaging and came across 26973 and remembered seeing it on the 
ml at some point recently. Here's a patch, as suggested by ajax [1].

Corbin: are there any patches from your bug triage branch that need to
go into the xserver?

[1] http://lists.freedesktop.org/archives/xorg-devel/2010-March/006666.html

 miext/shadow/shpacked.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/miext/shadow/shpacked.c b/miext/shadow/shpacked.c
index 20d2ea1..06606bc 100644
--- a/miext/shadow/shpacked.c
+++ b/miext/shadow/shpacked.c
@@ -102,8 +102,8 @@ shadowUpdatePacked (ScreenPtr	    pScreen,
 		width -= i;
 		scr += i;
 #define PickBit(a,i)	(((a) >> (i)) & 1)
-		while (i--)
-		    *win++ = *sha++;
+		memcpy(win, sha, i * sizeof(FbBits));
+		sha += i;
 	    }
 	    shaLine += shaStride;
 	    y++;
-- 
1.7.1