linux-kernel - Re: [PATCH v2 01/20] ARM: LPAE: Use PMD_(SHIFT|SIZE|MASK) instead of PGDIR

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Date:	Mon, 22 Nov 2010 12:43:53 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/20] ARM: LPAE: Use PMD_(SHIFT|SIZE|MASK) instead
	of PGDIR_*

On Fri, Nov 12, 2010 at 06:00:21PM +0000, Catalin Marinas wrote:
> diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
> index 8c19595..40b386c 100644
> --- a/arch/arm/kernel/smp.c
> +++ b/arch/arm/kernel/smp.c
> @@ -78,7 +78,7 @@ static inline void identity_mapping_add(pgd_t *pgd, unsigned long start,
>  	if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale())
>  		prot |= PMD_BIT4;
>  
> -	for (addr = start & PGDIR_MASK; addr < end;) {
> +	for (addr = start & PMD_MASK; addr < end;) {
>  		pmd = pmd_offset(pgd + pgd_index(addr), addr);
>  		pmd[0] = __pmd(addr | prot);
>  		addr += SECTION_SIZE;
> @@ -95,7 +95,7 @@ static inline void identity_mapping_del(pgd_t *pgd, unsigned long start,
>  	unsigned long addr;
>  	pmd_t *pmd;
>  
> -	for (addr = start & PGDIR_MASK; addr < end; addr += PGDIR_SIZE) {
> +	for (addr = start & PMD_MASK; addr < end; addr += PMD_SIZE) {
>  		pmd = pmd_offset(pgd + pgd_index(addr), addr);
>  		pmd[0] = __pmd(0);
>  		pmd[1] = __pmd(0);
...
> @@ -1068,12 +1068,12 @@ void setup_mm_for_reboot(char mode)
>  		base_pmdval |= PMD_BIT4;
>  
>  	for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++, pgd++) {
> -		unsigned long pmdval = (i << PGDIR_SHIFT) | base_pmdval;
> +		unsigned long pmdval = (i << PMD_SHIFT) | base_pmdval;
>  		pmd_t *pmd;
>  
> -		pmd = pmd_off(pgd, i << PGDIR_SHIFT);
> +		pmd = pmd_off(pgd, i << PMD_SHIFT);
>  		pmd[0] = __pmd(pmdval);
> -		pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1)));
> +		pmd[1] = __pmd(pmdval + (1 << (PMD_SHIFT - 1)));
>  		flush_pmd_entry(pmd);
>  	}
>  

This lot really does need unifying - and in any case this last addition
should be using 'SECTION SIZE' not something related to PMD shifts.

Strangely, it's something I've done over the weekend...
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