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Message-ID: <0f771b11539d5a3871691af901315ee2034b577c.camel@physik.fu-berlin.de>
Date:   Mon, 10 Jul 2023 10:45:48 +0200
From:   John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Baoquan He <bhe@...hat.com>
Cc:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        linux-mm@...ck.org, arnd@...db.de, hch@....de,
        christophe.leroy@...roup.eu, rppt@...nel.org, willy@...radead.org,
        agordeev@...ux.ibm.com, wangkefeng.wang@...wei.com,
        schnelle@...ux.ibm.com, shorne@...il.com, David.Laight@...lab.com,
        deller@....de, nathan@...nel.org,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>, linux-sh@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH v8 11/19] sh: add <asm-generic/io.h> including

Hi!

On Mon, 2023-07-10 at 10:17 +0200, Geert Uytterhoeven wrote:
> Hi Baoquan,
> 
> On Thu, Jul 6, 2023 at 5:49 PM Baoquan He <bhe@...hat.com> wrote:
> > In <asm-generic/io.h>, it provides a generic implementation of all
> > I/O accessors.
> > 
> > For some port|mm io functions, SuperH has its own implementation
> > in arch/sh/kernel/iomap.c and arch/sh/include/asm/io_noioport.h.
> > These will conflict with those in <asm-generic/io.h> and cause compiling
> > error. Hence add macro definitions to ensure that the SuperH version
> > of them will override the generic version.
> > 
> > Signed-off-by: Baoquan He <bhe@...hat.com>
> 
> Thanks for your patch, which is now commit edad4470b45298ba ("sh:
> add <asm-generic/io.h> including") in next-20230710.
> 
> This break dreamcast_defconfig:
> 
>   CC      arch/sh/kernel/asm-offsets.s
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:636:15: error: redefinition of ‘inb_p’
>   636 | #define inb_p inb_p
>       |               ^~~~~
> ./include/asm-generic/io.h:637:18: note: in expansion of macro ‘inb_p’
>   637 | static inline u8 inb_p(unsigned long addr)
>       |                  ^~~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:185:25: note: previous definition of
> ‘inb_p’ with type ‘u8(long unsigned int)’ {aka ‘unsigned char(long
> unsigned int)’}
>   185 | static inline type pfx##in##bwlq##p(unsigned long port)
>          \
>       |                         ^~
> ./arch/sh/include/asm/io.h:199:9: note: in expansion of macro
> ‘__BUILD_IOPORT_SINGLE’
>   199 |         __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
>       |         ^~~~~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:202:9: note: in expansion of macro
> ‘__BUILD_IOPORT_PFX’
>   202 |         __BUILD_IOPORT_PFX(, bwlq, type)
>       |         ^~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:204:1: note: in expansion of macro ‘BUILDIO_IOPORT’
>   204 | BUILDIO_IOPORT(b, u8)
>       | ^~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:644:15: error: redefinition of ‘inw_p’
>   644 | #define inw_p inw_p
>       |               ^~~~~
> ./include/asm-generic/io.h:645:19: note: in expansion of macro ‘inw_p’
>   645 | static inline u16 inw_p(unsigned long addr)
>       |                   ^~~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:185:25: note: previous definition of
> ‘inw_p’ with type ‘u16(long unsigned int)’ {aka ‘short unsigned
> int(long unsigned int)’}
>   185 | static inline type pfx##in##bwlq##p(unsigned long port)
>          \
>       |                         ^~
> ./arch/sh/include/asm/io.h:199:9: note: in expansion of macro
> ‘__BUILD_IOPORT_SINGLE’
>   199 |         __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
>       |         ^~~~~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:202:9: note: in expansion of macro
> ‘__BUILD_IOPORT_PFX’
>   202 |         __BUILD_IOPORT_PFX(, bwlq, type)
>       |         ^~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:205:1: note: in expansion of macro ‘BUILDIO_IOPORT’
>   205 | BUILDIO_IOPORT(w, u16)
>       | ^~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:652:15: error: redefinition of ‘inl_p’
>   652 | #define inl_p inl_p
>       |               ^~~~~
> ./include/asm-generic/io.h:653:19: note: in expansion of macro ‘inl_p’
>   653 | static inline u32 inl_p(unsigned long addr)
>       |                   ^~~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:185:25: note: previous definition of
> ‘inl_p’ with type ‘u32(long unsigned int)’ {aka ‘unsigned int(long
> unsigned int)’}
>   185 | static inline type pfx##in##bwlq##p(unsigned long port)
>          \
>       |                         ^~
> ./arch/sh/include/asm/io.h:199:9: note: in expansion of macro
> ‘__BUILD_IOPORT_SINGLE’
>   199 |         __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
>       |         ^~~~~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:202:9: note: in expansion of macro
> ‘__BUILD_IOPORT_PFX’
>   202 |         __BUILD_IOPORT_PFX(, bwlq, type)
>       |         ^~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:206:1: note: in expansion of macro ‘BUILDIO_IOPORT’
>   206 | BUILDIO_IOPORT(l, u32)
>       | ^~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:660:16: error: redefinition of ‘outb_p’
>   660 | #define outb_p outb_p
>       |                ^~~~~~
> ./include/asm-generic/io.h:661:20: note: in expansion of macro ‘outb_p’
>   661 | static inline void outb_p(u8 value, unsigned long addr)
>       |                    ^~~~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:176:25: note: previous definition of
> ‘outb_p’ with type ‘void(u8,  long unsigned int)’ {aka ‘void(unsigned
> char,  long unsigned int)’}
>   176 | static inline void pfx##out##bwlq##p(type val, unsigned long
> port)      \
>       |                         ^~~
> ./arch/sh/include/asm/io.h:199:9: note: in expansion of macro
> ‘__BUILD_IOPORT_SINGLE’
>   199 |         __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
>       |         ^~~~~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:202:9: note: in expansion of macro
> ‘__BUILD_IOPORT_PFX’
>   202 |         __BUILD_IOPORT_PFX(, bwlq, type)
>       |         ^~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:204:1: note: in expansion of macro ‘BUILDIO_IOPORT’
>   204 | BUILDIO_IOPORT(b, u8)
>       | ^~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:668:16: error: redefinition of ‘outw_p’
>   668 | #define outw_p outw_p
>       |                ^~~~~~
> ./include/asm-generic/io.h:669:20: note: in expansion of macro ‘outw_p’
>   669 | static inline void outw_p(u16 value, unsigned long addr)
>       |                    ^~~~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:176:25: note: previous definition of
> ‘outw_p’ with type ‘void(u16,  long unsigned int)’ {aka ‘void(short
> unsigned int,  long unsigned int)’}
>   176 | static inline void pfx##out##bwlq##p(type val, unsigned long
> port)      \
>       |                         ^~~
> ./arch/sh/include/asm/io.h:199:9: note: in expansion of macro
> ‘__BUILD_IOPORT_SINGLE’
>   199 |         __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
>       |         ^~~~~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:202:9: note: in expansion of macro
> ‘__BUILD_IOPORT_PFX’
>   202 |         __BUILD_IOPORT_PFX(, bwlq, type)
>       |         ^~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:205:1: note: in expansion of macro ‘BUILDIO_IOPORT’
>   205 | BUILDIO_IOPORT(w, u16)
>       | ^~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:676:16: error: redefinition of ‘outl_p’
>   676 | #define outl_p outl_p
>       |                ^~~~~~
> ./include/asm-generic/io.h:677:20: note: in expansion of macro ‘outl_p’
>   677 | static inline void outl_p(u32 value, unsigned long addr)
>       |                    ^~~~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:176:25: note: previous definition of
> ‘outl_p’ with type ‘void(u32,  long unsigned int)’ {aka ‘void(unsigned
> int,  long unsigned int)’}
>   176 | static inline void pfx##out##bwlq##p(type val, unsigned long
> port)      \
>       |                         ^~~
> ./arch/sh/include/asm/io.h:199:9: note: in expansion of macro
> ‘__BUILD_IOPORT_SINGLE’
>   199 |         __BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
>       |         ^~~~~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:202:9: note: in expansion of macro
> ‘__BUILD_IOPORT_PFX’
>   202 |         __BUILD_IOPORT_PFX(, bwlq, type)
>       |         ^~~~~~~~~~~~~~~~~~
> ./arch/sh/include/asm/io.h:206:1: note: in expansion of macro ‘BUILDIO_IOPORT’
>   206 | BUILDIO_IOPORT(l, u32)
>       | ^~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:689:14: error: redefinition of ‘insb’
>   689 | #define insb insb
>       |              ^~~~
> ./include/asm-generic/io.h:690:20: note: in expansion of macro ‘insb’
>   690 | static inline void insb(unsigned long addr, void *buffer,
> unsigned int count)
>       |                    ^~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:222:20: note: previous definition of ‘insb’
> with type ‘void(long unsigned int,  void *, unsigned int)’
>   222 | static inline void ins##bwlq(unsigned long port, void *addr,
>          \
>       |                    ^~~
> ./arch/sh/include/asm/io.h:233:1: note: in expansion of macro
> ‘__BUILD_IOPORT_STRING’
>   233 | __BUILD_IOPORT_STRING(b, u8)
>       | ^~~~~~~~~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:697:14: error: redefinition of ‘insw’
>   697 | #define insw insw
>       |              ^~~~
> ./include/asm-generic/io.h:698:20: note: in expansion of macro ‘insw’
>   698 | static inline void insw(unsigned long addr, void *buffer,
> unsigned int count)
>       |                    ^~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:222:20: note: previous definition of ‘insw’
> with type ‘void(long unsigned int,  void *, unsigned int)’
>   222 | static inline void ins##bwlq(unsigned long port, void *addr,
>          \
>       |                    ^~~
> ./arch/sh/include/asm/io.h:234:1: note: in expansion of macro
> ‘__BUILD_IOPORT_STRING’
>   234 | __BUILD_IOPORT_STRING(w, u16)
>       | ^~~~~~~~~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:705:14: error: redefinition of ‘insl’
>   705 | #define insl insl
>       |              ^~~~
> ./include/asm-generic/io.h:706:20: note: in expansion of macro ‘insl’
>   706 | static inline void insl(unsigned long addr, void *buffer,
> unsigned int count)
>       |                    ^~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:222:20: note: previous definition of ‘insl’
> with type ‘void(long unsigned int,  void *, unsigned int)’
>   222 | static inline void ins##bwlq(unsigned long port, void *addr,
>          \
>       |                    ^~~
> ./arch/sh/include/asm/io.h:235:1: note: in expansion of macro
> ‘__BUILD_IOPORT_STRING’
>   235 | __BUILD_IOPORT_STRING(l, u32)
>       | ^~~~~~~~~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:713:15: error: redefinition of ‘outsb’
>   713 | #define outsb outsb
>       |               ^~~~~
> ./include/asm-generic/io.h:714:20: note: in expansion of macro ‘outsb’
>   714 | static inline void outsb(unsigned long addr, const void *buffer,
>       |                    ^~~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:211:20: note: previous definition of
> ‘outsb’ with type ‘void(long unsigned int,  const void *, unsigned
> int)’
>   211 | static inline void outs##bwlq(unsigned long port, const void
> *addr,     \
>       |                    ^~~~
> ./arch/sh/include/asm/io.h:233:1: note: in expansion of macro
> ‘__BUILD_IOPORT_STRING’
>   233 | __BUILD_IOPORT_STRING(b, u8)
>       | ^~~~~~~~~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:722:15: error: redefinition of ‘outsw’
>   722 | #define outsw outsw
>       |               ^~~~~
> ./include/asm-generic/io.h:723:20: note: in expansion of macro ‘outsw’
>   723 | static inline void outsw(unsigned long addr, const void *buffer,
>       |                    ^~~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:211:20: note: previous definition of
> ‘outsw’ with type ‘void(long unsigned int,  const void *, unsigned
> int)’
>   211 | static inline void outs##bwlq(unsigned long port, const void
> *addr,     \
>       |                    ^~~~
> ./arch/sh/include/asm/io.h:234:1: note: in expansion of macro
> ‘__BUILD_IOPORT_STRING’
>   234 | __BUILD_IOPORT_STRING(w, u16)
>       | ^~~~~~~~~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:731:15: error: redefinition of ‘outsl’
>   731 | #define outsl outsl
>       |               ^~~~~
> ./include/asm-generic/io.h:732:20: note: in expansion of macro ‘outsl’
>   732 | static inline void outsl(unsigned long addr, const void *buffer,
>       |                    ^~~~~
> In file included from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./arch/sh/include/asm/io.h:211:20: note: previous definition of
> ‘outsl’ with type ‘void(long unsigned int,  const void *, unsigned
> int)’
>   211 | static inline void outs##bwlq(unsigned long port, const void
> *addr,     \
>       |                    ^~~~
> ./arch/sh/include/asm/io.h:235:1: note: in expansion of macro
> ‘__BUILD_IOPORT_STRING’
>   235 | __BUILD_IOPORT_STRING(l, u32)
>       | ^~~~~~~~~~~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:1111:20: error: static declaration of
> ‘ioport_map’ follows non-static declaration
>  1111 | #define ioport_map ioport_map
>       |                    ^~~~~~~~~~
> ./include/asm-generic/io.h:1112:29: note: in expansion of macro ‘ioport_map’
>  1112 | static inline void __iomem *ioport_map(unsigned long port,
> unsigned int nr)
>       |                             ^~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:22,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/iomap.h:92:22: note: previous declaration of
> ‘ioport_map’ with type ‘void *(long unsigned int,  unsigned int)’
>    92 | extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
>       |                      ^~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:290,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/io.h:1121:22: error: static declaration of
> ‘ioport_unmap’ follows non-static declaration
>  1121 | #define ioport_unmap ioport_unmap
>       |                      ^~~~~~~~~~~~
> ./include/asm-generic/io.h:1122:20: note: in expansion of macro ‘ioport_unmap’
>  1122 | static inline void ioport_unmap(void __iomem *p)
>       |                    ^~~~~~~~~~~~
> In file included from ./arch/sh/include/asm/io.h:22,
>                  from ./include/linux/io.h:13,
>                  from ./include/linux/irq.h:20,
>                  from ./include/asm-generic/hardirq.h:17,
>                  from ./arch/sh/include/asm/hardirq.h:9,
>                  from ./include/linux/hardirq.h:11,
>                  from ./include/linux/interrupt.h:11,
>                  from ./include/linux/kernel_stat.h:9,
>                  from ./include/linux/cgroup.h:26,
>                  from ./include/linux/memcontrol.h:13,
>                  from ./include/linux/swap.h:9,
>                  from ./include/linux/suspend.h:5,
>                  from arch/sh/kernel/asm-offsets.c:16:
> ./include/asm-generic/iomap.h:93:13: note: previous declaration of
> ‘ioport_unmap’ with type ‘void(void *)’
>    93 | extern void ioport_unmap(void __iomem *);
>       |             ^~~~~~~~~~~~
> make[2]: *** [scripts/Makefile.build:116: arch/sh/kernel/asm-offsets.s] Error 1
> make[1]: *** [Makefile:1275: prepare0] Error 2
> make: *** [Makefile:234: __sub-make] Error 2
> 
> > --- a/arch/sh/include/asm/io.h
> > +++ b/arch/sh/include/asm/io.h
> > @@ -119,6 +119,26 @@ void __raw_readsl(const void __iomem *addr, void *data, int longlen);
> > 
> >  __BUILD_MEMORY_STRING(__raw_, q, u64)
> > 
> > +#define ioread8 ioread8
> > +#define ioread16 ioread16
> > +#define ioread16be ioread16be
> > +#define ioread32 ioread32
> > +#define ioread32be ioread32be
> > +
> > +#define iowrite8 iowrite8
> > +#define iowrite16 iowrite16
> > +#define iowrite16be iowrite16be
> > +#define iowrite32 iowrite32
> > +#define iowrite32be iowrite32be
> > +
> > +#define ioread8_rep ioread8_rep
> > +#define ioread16_rep ioread16_rep
> > +#define ioread32_rep ioread32_rep
> > +
> > +#define iowrite8_rep iowrite8_rep
> > +#define iowrite16_rep iowrite16_rep
> > +#define iowrite32_rep iowrite32_rep
> > +
> >  #ifdef CONFIG_HAS_IOPORT_MAP
> > 
> >  /*
> > @@ -225,6 +245,9 @@ __BUILD_IOPORT_STRING(q, u64)
> >  #define IO_SPACE_LIMIT 0xffffffff
> > 
> >  /* We really want to try and get these to memcpy etc */
> > +#define memset_io memset_io
> > +#define memcpy_fromio memcpy_fromio
> > +#define memcpy_toio memcpy_toio
> >  void memcpy_fromio(void *, const volatile void __iomem *, unsigned long);
> >  void memcpy_toio(volatile void __iomem *, const void *, unsigned long);
> >  void memset_io(volatile void __iomem *, int, unsigned long);
> > @@ -287,6 +310,8 @@ static inline void iounmap(volatile void __iomem *addr) { }
> >   */
> >  #define xlate_dev_mem_ptr(p)   __va(p)
> > 
> > +#include <asm-generic/io.h>
> > +
> >  #define ARCH_HAS_VALID_PHYS_ADDR_RANGE
> >  int valid_phys_addr_range(phys_addr_t addr, size_t size);
> >  int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
> > diff --git a/arch/sh/include/asm/io_noioport.h b/arch/sh/include/asm/io_noioport.h
> > index f7938fe0f911..5ba4116b4265 100644
> > --- a/arch/sh/include/asm/io_noioport.h
> > +++ b/arch/sh/include/asm/io_noioport.h
> > @@ -53,6 +53,13 @@ static inline void ioport_unmap(void __iomem *addr)
> >  #define outw_p(x, addr)        outw((x), (addr))
> >  #define outl_p(x, addr)        outl((x), (addr))
> > 
> > +#define insb insb
> > +#define insw insw
> > +#define insl insl
> > +#define outsb outsb
> > +#define outsw outsw
> > +#define outsl outsl
> > +
> >  static inline void insb(unsigned long port, void *dst, unsigned long count)
> >  {
> >         BUG();
> > --
> > 2.34.1

I'm not happy though that this patch is in linux-next without being Acked by me
or being reviewed by anyone. We should always make sure first that the code
actually builds and has been tested on real hardware.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

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