Fix build errors on ARCH=alpha when CONFIG_MDA_CONSOLE=m.
This allows the ARCH macros to be the only ones defined.

In file included from ../drivers/video/console/mdacon.c:37:
../arch/alpha/include/asm/vga.h:17:40: error: expected identifier or '(' before 'volatile'
   17 | static inline void scr_writew(u16 val, volatile u16 *addr)
      |                                        ^~~~~~~~
../include/linux/vt_buffer.h:24:34: note: in definition of macro 'scr_writew'
   24 | #define scr_writew(val, addr) (*(addr) = (val))
      |                                  ^~~~
../include/linux/vt_buffer.h:24:40: error: expected ')' before '=' token
   24 | #define scr_writew(val, addr) (*(addr) = (val))
      |                                        ^
../arch/alpha/include/asm/vga.h:17:20: note: in expansion of macro 'scr_writew'
   17 | static inline void scr_writew(u16 val, volatile u16 *addr)
      |                    ^~~~~~~~~~
../arch/alpha/include/asm/vga.h:25:29: error: expected identifier or '(' before 'volatile'
   25 | static inline u16 scr_readw(volatile const u16 *addr)
      |                             ^~~~~~~~

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-fbdev@vger.kernel.org
---
 include/linux/vt_buffer.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -- a/include/linux/vt_buffer.h b/include/linux/vt_buffer.h
--- 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 IS_ENABLED(CONFIG_VGA_CONSOLE) || IS_ENABLED(CONFIG_MDA_CONSOLE)
 #include <asm/vga.h>
 #endif

On 3/29/23 04:15, Randy Dunlap wrote:
> Fix build errors on ARCH=alpha when CONFIG_MDA_CONSOLE=m.
> This allows the ARCH macros to be the only ones defined.
>
> In file included from ../drivers/video/console/mdacon.c:37:
> ../arch/alpha/include/asm/vga.h:17:40: error: expected identifier or '(' before 'volatile'
>     17 | static inline void scr_writew(u16 val, volatile u16 *addr)
>        |                                        ^~~~~~~~
> ../include/linux/vt_buffer.h:24:34: note: in definition of macro 'scr_writew'
>     24 | #define scr_writew(val, addr) (*(addr) = (val))
>        |                                  ^~~~
> ../include/linux/vt_buffer.h:24:40: error: expected ')' before '=' token
>     24 | #define scr_writew(val, addr) (*(addr) = (val))
>        |                                        ^
> ../arch/alpha/include/asm/vga.h:17:20: note: in expansion of macro 'scr_writew'
>     17 | static inline void scr_writew(u16 val, volatile u16 *addr)
>        |                    ^~~~~~~~~~
> ../arch/alpha/include/asm/vga.h:25:29: error: expected identifier or '(' before 'volatile'
>     25 | static inline u16 scr_readw(volatile const u16 *addr)
>        |                             ^~~~~~~~
>
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Jiri Slaby <jirislaby@kernel.org>
> Cc: dri-devel@lists.freedesktop.org
> Cc: linux-fbdev@vger.kernel.org

applied to fbdev git tree.

Thanks!
Helge

> ---
>   include/linux/vt_buffer.h |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff -- a/include/linux/vt_buffer.h b/include/linux/vt_buffer.h
> --- 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 IS_ENABLED(CONFIG_VGA_CONSOLE) || IS_ENABLED(CONFIG_MDA_CONSOLE)
>   #include <asm/vga.h>
>   #endif
>