diff mbox series

[v3,23/34] xtensa: mm: Add p?d_large() definitions

Message ID 20190227170608.27963-24-steven.price@arm.com (mailing list archive)
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 xtensa, we don't support large pages, so add a stub returning 0.

CC: Chris Zankel <chris@zankel.net>
CC: Max Filippov <jcmvbkbc@gmail.com>
CC: linux-xtensa@linux-xtensa.org
Signed-off-by: Steven Price <steven.price@arm.com>
---
 arch/xtensa/include/asm/pgtable.h | 1 +
 1 file changed, 1 insertion(+)

Comments

Max Filippov Feb. 27, 2019, 5:29 p.m. UTC | #1 
On Wed, Feb 27, 2019 at 9:07 AM Steven Price <steven.price@arm.com> 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 xtensa, we don't support large pages, so add a stub returning 0.
>
> CC: Chris Zankel <chris@zankel.net>
> CC: Max Filippov <jcmvbkbc@gmail.com>
> CC: linux-xtensa@linux-xtensa.org
> Signed-off-by: Steven Price <steven.price@arm.com>
> ---
>  arch/xtensa/include/asm/pgtable.h | 1 +
>  1 file changed, 1 insertion(+)

Acked-by: Max Filippov <jcmvbkbc@gmail.com>
diff mbox series

Patch

diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index 29cfe421cf41..60c3e86b9782 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -266,6 +266,7 @@  static inline void pgtable_cache_init(void) { }
 #define pmd_none(pmd)	 (!pmd_val(pmd))
 #define pmd_present(pmd) (pmd_val(pmd) & PAGE_MASK)
 #define pmd_bad(pmd)	 (pmd_val(pmd) & ~PAGE_MASK)
+#define pmd_large(pmd)	 (0)
 #define pmd_clear(pmdp)	 do { set_pmd(pmdp, __pmd(0)); } while (0)
 
 static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITABLE; }