[PATCH 2/8] asm-generic: define fallback memcpy and memset for device I/O

[Sascha Hauer]

On Fri, Jan 29, 2021 at 05:11:10PM +0100, Ahmad Fatoum wrote:
> The Atmel quadspi driver makes use of the memcpy_(to|from)io,
> but we don't define them on all platforms. Fix this to allow
> for easier porting of kernel code.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> ---
>  include/asm-generic/io.h | 53 ++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 53 insertions(+)

This patch breaks compilation for ARM:

In file included from /ptx/work/WORK_EIHEI/sha/backup/barebox/barebox-maintainer-utils/barebox/arch/arm/include/asm/io.h:6,
                 from include/io.h:5,
                 from arch/arm/lib32/io.c:3:
include/asm-generic/io.h:448:23: error: redefinition of 'memcpy_fromio'
  448 | #define memcpy_fromio memcpy_fromio
      |                       ^~~~~~~~~~~~~
arch/arm/lib32/io.c:9:6: note: in expansion of macro 'memcpy_fromio'
    9 | void memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
      |      ^~~~~~~~~~~~~
include/asm-generic/io.h:448:23: note: previous definition of 'memcpy_fromio' was here
  448 | #define memcpy_fromio memcpy_fromio
      |                       ^~~~~~~~~~~~~
include/asm-generic/io.h:457:20: note: in expansion of macro 'memcpy_fromio'
  457 | static inline void memcpy_fromio(void *buffer,
      |                    ^~~~~~~~~~~~~
include/asm-generic/io.h:466:21: error: redefinition of 'memcpy_toio'
  466 | #define memcpy_toio memcpy_toio
      |                     ^~~~~~~~~~~
arch/arm/lib32/io.c:24:6: note: in expansion of macro 'memcpy_toio'
   24 | void memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
      |      ^~~~~~~~~~~
include/asm-generic/io.h:466:21: note: previous definition of 'memcpy_toio' was here
  466 | #define memcpy_toio memcpy_toio
      |                     ^~~~~~~~~~~
include/asm-generic/io.h:475:20: note: in expansion of macro 'memcpy_toio'
  475 | static inline void memcpy_toio(volatile void __iomem *addr, const void *buffer,
      |                    ^~~~~~~~~~~
include/asm-generic/io.h:431:19: error: redefinition of 'memset_io'
  431 | #define memset_io memset_io
      |                   ^~~~~~~~~
arch/arm/lib32/io.c:39:6: note: in expansion of macro 'memset_io'
   39 | void memset_io(volatile void __iomem *dst, int c, size_t count)
      |      ^~~~~~~~~
include/asm-generic/io.h:431:19: note: previous definition of 'memset_io' was here
  431 | #define memset_io memset_io
      |                   ^~~~~~~~~
include/asm-generic/io.h:440:20: note: in expansion of macro 'memset_io'
  440 | static inline void memset_io(volatile void __iomem *addr, int value,
      |                    ^~~~~~~~~


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