Re: [PATCH v2 6/9] x86: Optimize virt_to_phys() and phys_to_virt()

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On Wed, Apr 27, 2016 at 03:13:55PM +0200, Alexander Gordeev wrote:
> Make use of generic implementations and remove x86
> specific virt_to_phys() and phys_to_virt() functions.

I would drop this patch. If x86 needs/wants more stuff from
lib/asm-generic/io.h at a later time, then it can be brought
in then.

thanks,
drew

> 
> Cc: Andrew Jones <drjones@xxxxxxxxxx>
> Cc: Thomas Huth <thuth@xxxxxxxxxx>
> Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx>
> Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxx>
> ---
>  lib/asm-generic/io.h |  2 ++
>  lib/x86/asm/io.h     | 10 +---------
>  lib/x86/asm/page.h   |  3 +++
>  3 files changed, 6 insertions(+), 9 deletions(-)
> 
> diff --git a/lib/asm-generic/io.h b/lib/asm-generic/io.h
> index 931415a..3585ac0 100644
> --- a/lib/asm-generic/io.h
> +++ b/lib/asm-generic/io.h
> @@ -165,7 +165,9 @@ static inline unsigned long virt_to_phys(volatile void *address)
>  {
>  	return __pa((unsigned long)address);
>  }
> +#endif
>  
> +#ifndef phys_to_virt
>  static inline void *phys_to_virt(unsigned long address)
>  {
>  	return __va(address);
> diff --git a/lib/x86/asm/io.h b/lib/x86/asm/io.h
> index 5b901a3..74451d5 100644
> --- a/lib/x86/asm/io.h
> +++ b/lib/x86/asm/io.h
> @@ -40,14 +40,6 @@ static inline void outl(unsigned int value, unsigned short port)
>      asm volatile("outl %0, %w1" : : "a"(value), "Nd"(port));
>  }
>  
> -static inline unsigned long virt_to_phys(const void *virt)
> -{
> -    return (unsigned long)virt;
> -}
> -
> -static inline void *phys_to_virt(unsigned long phys)
> -{
> -    return (void *)phys;
> -}
> +#include <asm-generic/io.h>
>  
>  #endif
> diff --git a/lib/x86/asm/page.h b/lib/x86/asm/page.h
> index edfe325..a9280ed 100644
> --- a/lib/x86/asm/page.h
> +++ b/lib/x86/asm/page.h
> @@ -24,4 +24,7 @@
>  #define	PGDIR_MASK	1023
>  #endif
>  
> +#define __va(x)		((void *)((unsigned long) (x)))
> +#define __pa(x)		((unsigned long) (x))
> +
>  #endif
> -- 
> 1.8.3.1
> 
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