Re: [PATCH v4 06/11] hugetlb: Introduce generic version of huge_pte_none

From: Mike Kravetz <mike.kravetz@oracle.com>
To: Alexandre Ghiti <alex@ghiti.fr>,
	linux@armlinux.org.uk, catalin.marinas@arm.com,
	will.deacon@arm.com, tony.luck@intel.com, fenghua.yu@intel.com,
	ralf@linux-mips.org, paul.burton@mips.com, jhogan@kernel.org,
	jejb@parisc-linux.org, deller@gmx.de, benh@kernel.crashing.org,
	paulus@samba.org, mpe@ellerman.id.au, ysato@users.sourceforge.jp,
	dalias@libc.org, davem@davemloft.net, tglx@linutronix.de,
	mingo@redhat.com, hpa@zytor.com, x86@kernel.org, arnd@arndb.de,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
	linux-mips@linux-mips.org, linux-parisc@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org,
	sparclinux@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH v4 06/11] hugetlb: Introduce generic version of huge_pte_none
Date: Thu, 26 Jul 2018 19:04:22 +0000	[thread overview]
Message-ID: <83774c94-e71c-a416-4b1b-e005f496aaa0@oracle.com> (raw)
In-Reply-To: <20180705110716.3919-7-alex@ghiti.fr>

On 07/05/2018 04:07 AM, Alexandre Ghiti wrote:
> arm, arm64, ia64, parisc, powerpc, sh, sparc, x86 architectures
> use the same version of huge_pte_none, so move this generic
> implementation into asm-generic/hugetlb.h.
> 

Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
-- 
Mike Kravetz

> Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
> ---
>  arch/arm/include/asm/hugetlb.h     | 5 -----
>  arch/arm64/include/asm/hugetlb.h   | 5 -----
>  arch/ia64/include/asm/hugetlb.h    | 5 -----
>  arch/mips/include/asm/hugetlb.h    | 1 +
>  arch/parisc/include/asm/hugetlb.h  | 5 -----
>  arch/powerpc/include/asm/hugetlb.h | 5 -----
>  arch/sh/include/asm/hugetlb.h      | 5 -----
>  arch/sparc/include/asm/hugetlb.h   | 5 -----
>  arch/x86/include/asm/hugetlb.h     | 5 -----
>  include/asm-generic/hugetlb.h      | 7 +++++++
>  10 files changed, 8 insertions(+), 40 deletions(-)
> 
> diff --git a/arch/arm/include/asm/hugetlb.h b/arch/arm/include/asm/hugetlb.h
> index 047b893ef95d..3d2ce4dbc145 100644
> --- a/arch/arm/include/asm/hugetlb.h
> +++ b/arch/arm/include/asm/hugetlb.h
> @@ -43,11 +43,6 @@ static inline int prepare_hugepage_range(struct file *file,
>  	return 0;
>  }
>  
> -static inline int huge_pte_none(pte_t pte)
> -{
> -	return pte_none(pte);
> -}
> -
>  static inline pte_t huge_pte_wrprotect(pte_t pte)
>  {
>  	return pte_wrprotect(pte);
> diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h
> index 4c8dd488554d..49247c6f94db 100644
> --- a/arch/arm64/include/asm/hugetlb.h
> +++ b/arch/arm64/include/asm/hugetlb.h
> @@ -42,11 +42,6 @@ static inline int prepare_hugepage_range(struct file *file,
>  	return 0;
>  }
>  
> -static inline int huge_pte_none(pte_t pte)
> -{
> -	return pte_none(pte);
> -}
> -
>  static inline pte_t huge_pte_wrprotect(pte_t pte)
>  {
>  	return pte_wrprotect(pte);
> diff --git a/arch/ia64/include/asm/hugetlb.h b/arch/ia64/include/asm/hugetlb.h
> index 41b5f6adeee4..bf573500b3c4 100644
> --- a/arch/ia64/include/asm/hugetlb.h
> +++ b/arch/ia64/include/asm/hugetlb.h
> @@ -26,11 +26,6 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
>  {
>  }
>  
> -static inline int huge_pte_none(pte_t pte)
> -{
> -	return pte_none(pte);
> -}
> -
>  static inline pte_t huge_pte_wrprotect(pte_t pte)
>  {
>  	return pte_wrprotect(pte);
> diff --git a/arch/mips/include/asm/hugetlb.h b/arch/mips/include/asm/hugetlb.h
> index 7df1f116a3cc..1c9c4531376c 100644
> --- a/arch/mips/include/asm/hugetlb.h
> +++ b/arch/mips/include/asm/hugetlb.h
> @@ -55,6 +55,7 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
>  	flush_tlb_page(vma, addr & huge_page_mask(hstate_vma(vma)));
>  }
>  
> +#define __HAVE_ARCH_HUGE_PTE_NONE
>  static inline int huge_pte_none(pte_t pte)
>  {
>  	unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
> diff --git a/arch/parisc/include/asm/hugetlb.h b/arch/parisc/include/asm/hugetlb.h
> index 9afff26747a1..c09d8c74553c 100644
> --- a/arch/parisc/include/asm/hugetlb.h
> +++ b/arch/parisc/include/asm/hugetlb.h
> @@ -38,11 +38,6 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
>  {
>  }
>  
> -static inline int huge_pte_none(pte_t pte)
> -{
> -	return pte_none(pte);
> -}
> -
>  static inline pte_t huge_pte_wrprotect(pte_t pte)
>  {
>  	return pte_wrprotect(pte);
> diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h
> index 0b02856aa85b..3562d46585ba 100644
> --- a/arch/powerpc/include/asm/hugetlb.h
> +++ b/arch/powerpc/include/asm/hugetlb.h
> @@ -152,11 +152,6 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
>  	flush_hugetlb_page(vma, addr);
>  }
>  
> -static inline int huge_pte_none(pte_t pte)
> -{
> -	return pte_none(pte);
> -}
> -
>  static inline pte_t huge_pte_wrprotect(pte_t pte)
>  {
>  	return pte_wrprotect(pte);
> diff --git a/arch/sh/include/asm/hugetlb.h b/arch/sh/include/asm/hugetlb.h
> index 9abf9c86b769..a9f8266f33cf 100644
> --- a/arch/sh/include/asm/hugetlb.h
> +++ b/arch/sh/include/asm/hugetlb.h
> @@ -31,11 +31,6 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
>  {
>  }
>  
> -static inline int huge_pte_none(pte_t pte)
> -{
> -	return pte_none(pte);
> -}
> -
>  static inline pte_t huge_pte_wrprotect(pte_t pte)
>  {
>  	return pte_wrprotect(pte);
> diff --git a/arch/sparc/include/asm/hugetlb.h b/arch/sparc/include/asm/hugetlb.h
> index 651a9593fcee..11115bbd712e 100644
> --- a/arch/sparc/include/asm/hugetlb.h
> +++ b/arch/sparc/include/asm/hugetlb.h
> @@ -48,11 +48,6 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
>  {
>  }
>  
> -static inline int huge_pte_none(pte_t pte)
> -{
> -	return pte_none(pte);
> -}
> -
>  static inline pte_t huge_pte_wrprotect(pte_t pte)
>  {
>  	return pte_wrprotect(pte);
> diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h
> index 8347d5abf882..c5fdc53b6e41 100644
> --- a/arch/x86/include/asm/hugetlb.h
> +++ b/arch/x86/include/asm/hugetlb.h
> @@ -27,11 +27,6 @@ static inline int prepare_hugepage_range(struct file *file,
>  	return 0;
>  }
>  
> -static inline int huge_pte_none(pte_t pte)
> -{
> -	return pte_none(pte);
> -}
> -
>  static inline pte_t huge_pte_wrprotect(pte_t pte)
>  {
>  	return pte_wrprotect(pte);
> diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
> index ffa63fd8388d..2fc3d68424e9 100644
> --- a/include/asm-generic/hugetlb.h
> +++ b/include/asm-generic/hugetlb.h
> @@ -73,4 +73,11 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
>  }
>  #endif
>  
> +#ifndef __HAVE_ARCH_HUGE_PTE_NONE
> +static inline int huge_pte_none(pte_t pte)
> +{
> +	return pte_none(pte);
> +}
> +#endif
> +
>  #endif /* _ASM_GENERIC_HUGETLB_H */
>