linux-kernel - [PATCH] m68k: Fix VGA I/O defines

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Message-ID: <20250107095912.130530-1-tzimmermann@suse.de>
Date: Tue,  7 Jan 2025 10:58:56 +0100
From: Thomas Zimmermann <tzimmermann@...e.de>
To: geert@...ux-m68k.org
Cc: linux-m68k@...ts.linux-m68k.org,
	linux-kernel@...r.kernel.org,
	Thomas Zimmermann <tzimmermann@...e.de>,
	kernel test robot <lkp@...el.com>,
	linux-fbdev@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	Helge Deller <deller@....de>,
	stable@...r.kernel.org
Subject: [PATCH] m68k: Fix VGA I/O defines

Including m86k's <asm/raw_io.h> in vga.h on nommu platforms results
in conflicting defines with io_no.h for various I/O macros from the
__raw_read and __raw_write families. An example error is

   In file included from arch/m68k/include/asm/vga.h:12,
                 from include/video/vga.h:22,
                 from include/linux/vgaarb.h:34,
		 from drivers/video/aperture.c:12:
>> arch/m68k/include/asm/raw_io.h:39: warning: "__raw_readb" redefined
      39 | #define __raw_readb in_8
	 |
   In file included from arch/m68k/include/asm/io.h:6,
		    from include/linux/io.h:13,
		    from include/linux/irq.h:20,
		    from include/asm-generic/hardirq.h:17,
		    from ./arch/m68k/include/generated/asm/hardirq.h:1,
		    from include/linux/hardirq.h:11,
		    from include/linux/interrupt.h:11,
                    from include/linux/trace_recursion.h:5,
		    from include/linux/ftrace.h:10,
		    from include/linux/kprobes.h:28,
		    from include/linux/kgdb.h:19,
		    from include/linux/fb.h:6,
		    from drivers/video/aperture.c:5:
   arch/m68k/include/asm/io_no.h:16: note: this is the location of the previous definition
      16 | #define __raw_readb(addr) \
	 |

Include <asm/io.h>, which avoid raw_io.h on nommu platforms. Also change
the defined values of some of the read/write symbols in vga.h to
__raw_read/__raw_write as the raw_in/raw_out symbols are not generally
available.

Signed-off-by: Thomas Zimmermann <tzimmermann@...e.de>
Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202501071629.DNEswlm8-lkp@intel.com/
Fixes: 5c3f968712ce ("m68k/video: Create <asm/vga.h>")
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: linux-fbdev@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org
Cc: Helge Deller <deller@....de>
Cc: <stable@...r.kernel.org> # v3.5+
---
 arch/m68k/include/asm/vga.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/m68k/include/asm/vga.h b/arch/m68k/include/asm/vga.h
index 4742e6bc3ab8..cdd414fa8710 100644
--- a/arch/m68k/include/asm/vga.h
+++ b/arch/m68k/include/asm/vga.h
@@ -9,7 +9,7 @@
  */
 #ifndef CONFIG_PCI
 
-#include <asm/raw_io.h>
+#include <asm/io.h>
 #include <asm/kmap.h>
 
 /*
@@ -29,9 +29,9 @@
 #define inw_p(port)		0
 #define outb_p(port, val)	do { } while (0)
 #define outw(port, val)		do { } while (0)
-#define readb			raw_inb
-#define writeb			raw_outb
-#define writew			raw_outw
+#define readb			__raw_readb
+#define writeb			__raw_writeb
+#define writew			__raw_writew
 
 #endif /* CONFIG_PCI */
 #endif /* _ASM_M68K_VGA_H */
-- 
2.47.1