linux-kernel - Re: [tip:x86/mm] x86: Move some contents of page_64_types.h into pgtable_64.h and page

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Date:	Fri, 16 Nov 2012 16:30:25 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	mingo@...nel.org, hpa@...or.com, linux-kernel@...r.kernel.org,
	alexander.h.duyck@...el.com, tglx@...utronix.de,
	hpa@...ux.intel.com
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/mm] x86: Move some contents of page_64_types.h into
 pgtable_64.h and page_64.h

On Fri, Nov 16, 2012 at 4:22 PM, tip-bot for Alexander Duyck
<alexander.h.duyck@...el.com> wrote:
> Commit-ID:  66d61384e9b4087f044ce86cb4adb12fe4623a6b
> Gitweb:     http://git.kernel.org/tip/66d61384e9b4087f044ce86cb4adb12fe4623a6b
> Author:     Alexander Duyck <alexander.h.duyck@...el.com>
> AuthorDate: Fri, 16 Nov 2012 13:53:09 -0800
> Committer:  H. Peter Anvin <hpa@...ux.intel.com>
> CommitDate: Fri, 16 Nov 2012 15:20:10 -0800
>
> x86: Move some contents of page_64_types.h into pgtable_64.h and page_64.h
>
> This patch is meant to clean-up the fact that we have several functions in
> page_64_types.h which really don't belong there.  I found this issue when I
> had tried to replace __phys_addr with an inline function.  It resulted in the
> realmode bits generating compile warnings about types.  In order to resolve
> that I am relocating the address translation to page_64.h since this is in
> keeping with where these functions are located in 32 bit.
>
> In addtion I have relocated several functions defined in init_64.c to
> pgtable_64.h as this seems to be where most of the functions related to
> memory initialization were already located.
>
> Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
> Link: http://lkml.kernel.org/r/20121116215244.8521.31505.stgit@ahduyck-cp1.jf.intel.com
> Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
> ---
>  arch/x86/include/asm/page_64.h       | 19 +++++++++++++++++++
>  arch/x86/include/asm/page_64_types.h | 22 ----------------------
>  arch/x86/include/asm/pgtable_64.h    |  5 +++++
>  3 files changed, 24 insertions(+), 22 deletions(-)
>
> diff --git a/arch/x86/include/asm/page_64.h b/arch/x86/include/asm/page_64.h
> index 072694e..4150999 100644
> --- a/arch/x86/include/asm/page_64.h
> +++ b/arch/x86/include/asm/page_64.h
> @@ -3,4 +3,23 @@
>
>  #include <asm/page_64_types.h>
>
> +#ifndef __ASSEMBLY__
> +
> +/* duplicated to the one in bootmem.h */
> +extern unsigned long max_pfn;
> +extern unsigned long phys_base;
> +
> +extern unsigned long __phys_addr(unsigned long);
> +
> +#define __phys_reloc_hide(x)   (x)
> +
> +#ifdef CONFIG_FLATMEM
> +#define pfn_valid(pfn)          ((pfn) < max_pfn)
> +#endif
> +
> +void clear_page(void *page);
> +void copy_page(void *to, void *from);
> +
> +#endif /* !__ASSEMBLY__ */
> +
>  #endif /* _ASM_X86_PAGE_64_H */
> diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h
> index 320f7bb..8b491e6 100644
> --- a/arch/x86/include/asm/page_64_types.h
> +++ b/arch/x86/include/asm/page_64_types.h
> @@ -50,26 +50,4 @@
>  #define KERNEL_IMAGE_SIZE      (512 * 1024 * 1024)
>  #define KERNEL_IMAGE_START     _AC(0xffffffff80000000, UL)
>
> -#ifndef __ASSEMBLY__
> -void clear_page(void *page);
> -void copy_page(void *to, void *from);
> -
> -/* duplicated to the one in bootmem.h */
> -extern unsigned long max_pfn;
> -extern unsigned long phys_base;
> -
> -extern unsigned long __phys_addr(unsigned long);
> -#define __phys_reloc_hide(x)   (x)
> -
> -#define vmemmap ((struct page *)VMEMMAP_START)
> -
> -extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
> -extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
> -
> -#endif /* !__ASSEMBLY__ */
> -
> -#ifdef CONFIG_FLATMEM
> -#define pfn_valid(pfn)          ((pfn) < max_pfn)
> -#endif
> -
>  #endif /* _ASM_X86_PAGE_64_DEFS_H */
> diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
> index 47356f9..b5d30ad 100644
> --- a/arch/x86/include/asm/pgtable_64.h
> +++ b/arch/x86/include/asm/pgtable_64.h
> @@ -183,6 +183,11 @@ extern void cleanup_highmap(void);
>
>  #define __HAVE_ARCH_PTE_SAME
>
> +#define vmemmap ((struct page *)VMEMMAP_START)
> +
> +extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
> +extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
> +
>  #endif /* !__ASSEMBLY__ */
>
>  #endif /* _ASM_X86_PGTABLE_64_H */
> --

arch/x86/kernel/apic/apic_numachip.c: In function ‘map_csrs’:
arch/x86/kernel/apic/apic_numachip.c:158:2: error: implicit
declaration of function ‘init_extra_mapping_uc’
[-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
--
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