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[v3,06/34] csky: mm: Add p?d_large() definitions

Message ID 20190227170608.27963-7-steven.price@arm.com
State New, archived
Headers show
Series Convert x86 & arm64 to use generic page walk | expand

Commit Message

Steven Price Feb. 27, 2019, 5:05 p.m. UTC
walk_page_range() is going to be allowed to walk page tables other than
those of user space. For this it needs to know when it has reached a
'leaf' entry in the page tables. This information is provided by the
p?d_large() functions/macros.

For csky, we don't support large pages, so add a stub returning 0.

CC: Guo Ren <guoren@kernel.org>
Signed-off-by: Steven Price <steven.price@arm.com>
---
 arch/csky/include/asm/pgtable.h | 2 ++
 1 file changed, 2 insertions(+)

Comments

Kirill A. Shutemov March 1, 2019, 9:51 p.m. UTC | #1
On Wed, Feb 27, 2019 at 05:05:40PM +0000, Steven Price wrote:
> walk_page_range() is going to be allowed to walk page tables other than
> those of user space. For this it needs to know when it has reached a
> 'leaf' entry in the page tables. This information is provided by the
> p?d_large() functions/macros.
> 
> For csky, we don't support large pages, so add a stub returning 0.
> 
> CC: Guo Ren <guoren@kernel.org>
> Signed-off-by: Steven Price <steven.price@arm.com>
> ---
>  arch/csky/include/asm/pgtable.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h
> index edfcbb25fd9f..4ffdb6bfbede 100644
> --- a/arch/csky/include/asm/pgtable.h
> +++ b/arch/csky/include/asm/pgtable.h
> @@ -158,6 +158,8 @@ static inline int pmd_present(pmd_t pmd)
>  	return (pmd_val(pmd) != __pa(invalid_pte_table));
>  }
>  
> +#define pmd_large(pmd)	(0)

Nit: here and in other places, parentheses around 0 is not needed.
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Patch

diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h
index edfcbb25fd9f..4ffdb6bfbede 100644
--- a/arch/csky/include/asm/pgtable.h
+++ b/arch/csky/include/asm/pgtable.h
@@ -158,6 +158,8 @@  static inline int pmd_present(pmd_t pmd)
 	return (pmd_val(pmd) != __pa(invalid_pte_table));
 }
 
+#define pmd_large(pmd)	(0)
+
 static inline void pmd_clear(pmd_t *p)
 {
 	pmd_val(*p) = (__pa(invalid_pte_table));