linux-kernel - Re: [PATCH 22/38] metag: drop _PAGE_FILE and pte

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Message-ID: <54A6C161.30300@imgtec.com>
Date:	Fri, 2 Jan 2015 16:03:45 +0000
From:	James Hogan <james.hogan@...tec.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	<akpm@...ux-foundation.org>
CC:	<peterz@...radead.org>, <mingo@...nel.org>, <davej@...hat.com>,
	<sasha.levin@...cle.com>, <hughd@...gle.com>, <linux-mm@...ck.org>,
	<linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 22/38] metag: drop _PAGE_FILE and pte_file()-related helpers

On 24/12/14 12:22, Kirill A. Shutemov wrote:
> We've replaced remap_file_pages(2) implementation with emulation.
> Nobody creates non-linear mapping anymore.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Cc: James Hogan <james.hogan@...tec.com>

Acked-by: James Hogan <james.hogan@...tec.com>

Cheers
James

> ---
>  arch/metag/include/asm/pgtable.h | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/arch/metag/include/asm/pgtable.h b/arch/metag/include/asm/pgtable.h
> index 0d9dc5487296..d0604c0a8702 100644
> --- a/arch/metag/include/asm/pgtable.h
> +++ b/arch/metag/include/asm/pgtable.h
> @@ -47,7 +47,6 @@
>   */
>  #define _PAGE_ACCESSED		_PAGE_ALWAYS_ZERO_1
>  #define _PAGE_DIRTY		_PAGE_ALWAYS_ZERO_2
> -#define _PAGE_FILE		_PAGE_ALWAYS_ZERO_3
>  
>  /* Pages owned, and protected by, the kernel. */
>  #define _PAGE_KERNEL		_PAGE_PRIV
> @@ -219,7 +218,6 @@ extern unsigned long empty_zero_page;
>  static inline int pte_write(pte_t pte)   { return pte_val(pte) & _PAGE_WRITE; }
>  static inline int pte_dirty(pte_t pte)   { return pte_val(pte) & _PAGE_DIRTY; }
>  static inline int pte_young(pte_t pte)   { return pte_val(pte) & _PAGE_ACCESSED; }
> -static inline int pte_file(pte_t pte)    { return pte_val(pte) & _PAGE_FILE; }
>  static inline int pte_special(pte_t pte) { return 0; }
>  
>  static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= (~_PAGE_WRITE); return pte; }
> @@ -327,10 +325,6 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
>  #define __pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) })
>  #define __swp_entry_to_pte(x)		((pte_t) { (x).val })
>  
> -#define PTE_FILE_MAX_BITS	22
> -#define pte_to_pgoff(x)		(pte_val(x) >> 10)
> -#define pgoff_to_pte(x)		__pte(((x) << 10) | _PAGE_FILE)
> -
>  #define kern_addr_valid(addr)	(1)
>  
>  /*
> 


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