From: Jackie Liu <liuyun01@xxxxxxxxxx>
CONFIG_VGA_CONSOLE=n and CONFIG_MDA_CONSOLE=n will cause vt_buffer.h not
include <asm/vga.h>.
But if we set CONFIG_MDA_CONSOLE=m, mdacon.c include <linux/vt_buffer.h>
is in front of include <asm/vga.h>. VT_BUF_HAVE_MEMSETW is not defined,
so vt_buffer.h will define a scr_memsetw, after that, vga.h also define
a scr_memsetw, so the repeated definition of scr_memsetw appears, builds
error.
We only need to make vt_buffer.h also contain vga.h when
CONFIG_MDA_CONSOLE=m. This problem can be fixed.
BTW, mdacon.c no need to include vga.h forcibly, let vt_buffer.h do it.
Cc: linux-fbdev@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Fixes: ac036f9570a2 ("vga: optimise console scrolling")
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jackie Liu <liuyun01@xxxxxxxxxx>
---
drivers/video/console/mdacon.c | 1 -
include/linux/vt_buffer.h | 2 +-
2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/video/console/mdacon.c b/drivers/video/console/mdacon.c
index ef29b321967f..5898d01bc492 100644
--- a/drivers/video/console/mdacon.c
+++ b/drivers/video/console/mdacon.c
@@ -42,7 +42,6 @@
#include <linux/init.h>
#include <asm/io.h>
-#include <asm/vga.h>
static DEFINE_SPINLOCK(mda_lock);
diff --git a/include/linux/vt_buffer.h b/include/linux/vt_buffer.h
index 848db1b1569f..3a79cc27a33b 100644
--- a/include/linux/vt_buffer.h
+++ b/include/linux/vt_buffer.h
@@ -16,7 +16,7 @@
#include <linux/string.h>
-#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
+#if defined(CONFIG_VGA_CONSOLE) || IS_ENABLED(CONFIG_MDA_CONSOLE)
#include <asm/vga.h>
#endif
--
2.25.1
