From: Alan Cox <alan@linux.intel.com>
Date: Sun, 31 May 2015 15:59:39 +0000 (+0100)
Subject: z80fixedbank: Enable Tormod's UDATA optimisation
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=500d47b9ff1e2cb80446de7af9482f6bb6eddb2b;p=FUZIX.git

z80fixedbank: Enable Tormod's UDATA optimisation
---

diff --git a/Kernel/lib/z80fixedbank.s b/Kernel/lib/z80fixedbank.s
index 78ad933e..864f09ef 100644
--- a/Kernel/lib/z80fixedbank.s
+++ b/Kernel/lib/z80fixedbank.s
@@ -117,10 +117,10 @@ _switchin:
 	pop hl
 	ld a, (hl)
 not_swapped:
-;	ld hl, (U_DATA__U_PTAB)
-;	or a
-;	sbc hl, de
-;	jr z, skip_copyback	; Tormod's optimisation: don't copy the
+	ld hl, (U_DATA__U_PTAB)
+	or a
+	sbc hl, de
+	jr z, skip_copyback	; Tormod's optimisation: don't copy the
 				; the stash back if we are the task who
 				; last owned the real udata
 	; Pages please !