From 94e02b3df32dba89824a494c2729bb734ce61431 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Date: Tue, 2 Jun 2020 13:50:50 +0200
Subject: video: fbdev: amifb: add FIXME about dead APUS support
Git-commit: 40bf8c3ad4ad9cdb569ee01a752225699dad5e20
Patch-mainline: v5.9-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
On 5/14/20 10:21 PM, Geert Uytterhoeven wrote:
> These #ifdefs are relics from APUS (Amiga Power-Up System), which
> added a PPC board. APUS support was killed off a long time ago,
> when arch/ppc/ was still king, but these #ifdefs were missed, because
> they didn't test for CONFIG_APUS.
Add FIXME about using the C code variants (APUS ones) in the future.
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/767d36ff-22ec-8136-7ebc-1d9d0d3ac98d@samsung.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/video/fbdev/amifb.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/video/fbdev/amifb.c b/drivers/video/fbdev/amifb.c
index 6062104f3afb..b2aeb8d3a0f0 100644
--- a/drivers/video/fbdev/amifb.c
+++ b/drivers/video/fbdev/amifb.c
@@ -575,6 +575,12 @@ static u_short maxfmode, chipset;
#define downx(x, v) ((v) & -(x))
#define modx(x, v) ((v) & ((x) - 1))
+/*
+ * FIXME: Use C variants of the code marked with #ifdef __mc68000__
+ * in the driver. It shouldn't negatively affect the performance and
+ * is required for APUS support (once it is re-added to the kernel).
+ * Needs to be tested on the hardware though..
+ */
/* if x1 is not a constant, this macro won't make real sense :-) */
#ifdef __mc68000__
#define DIVUL(x1, x2) ({int res; asm("divul %1,%2,%3": "=d" (res): \
--
2.29.2