| Message ID | 20191007153822.16518-3-steven.price@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Generic page walk and ptdump | expand |
On 10/7/19 8:38 AM, 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 will be provided by the > p?d_leaf() functions/macros. > > For arc, we only have two levels, so only pmd_leaf() is needed. > > CC: Vineet Gupta <vgupta@synopsys.com> > CC: linux-snps-arc@lists.infradead.org > Signed-off-by: Steven Price <steven.price@arm.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> -Vineet
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h index 7addd0301c51..5ec798e50836 100644 --- a/arch/arc/include/asm/pgtable.h +++ b/arch/arc/include/asm/pgtable.h @@ -274,6 +274,7 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep) #define pmd_none(x) (!pmd_val(x)) #define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK)) #define pmd_present(x) (pmd_val(x)) +#define pmd_leaf(x) (pmd_val(pmd) & _PAGE_HW_SZ) #define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0) #define pte_page(pte) pfn_to_page(pte_pfn(pte))
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 will be provided by the p?d_leaf() functions/macros. For arc, we only have two levels, so only pmd_leaf() is needed. CC: Vineet Gupta <vgupta@synopsys.com> CC: linux-snps-arc@lists.infradead.org Signed-off-by: Steven Price <steven.price@arm.com> --- arch/arc/include/asm/pgtable.h | 1 + 1 file changed, 1 insertion(+)