Re: [PATCH 07/28] ARM: mmu: Separate index and address in create_sections()

[Sascha Hauer <s.hauer@pengutronix.de>]

Hi Andrey,

On Tue, May 08, 2018 at 02:29:30PM -0700, Andrey Smirnov wrote:
> Both TTB index and address used to fill that entry are derived from
> the same variable 'addr' which requires shifting right and left by 20
> and somewhat confusing.
> 
> Split the counter used to iterate over elements of  TTB into a
> separate variable to make this code a bit easier to read.
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> ---
>  arch/arm/cpu/mmu.h | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/cpu/mmu.h b/arch/arm/cpu/mmu.h
> index 59f72049f..8b51e3f9f 100644
> --- a/arch/arm/cpu/mmu.h
> +++ b/arch/arm/cpu/mmu.h
> @@ -28,8 +28,12 @@ static inline void
>  create_sections(uint32_t *ttb, unsigned long addr,
>  		int size_m, unsigned int flags)
>  {
> -	for (addr >>= 20; addr < size_m; addr++)
> -		ttb[addr] = (addr << 20) | flags;
> +	unsigned long ttb_start = add >> 20;

This will break compilation. "addr" instead of "add".

Sascha

> +	unsigned long ttb_end   = ttb_start + size_m;
> +	unsigned int i;
> +
> +	for (i = ttb_start; i < ttb_end; i++, addr += SZ_1M)
> +		ttb[i] = addr | flags;
>  }
>  
>  
> -- 
> 2.17.0
> 
> 
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