In riscv, a page table entry is leaf when any bit of read, write,
or execute bit is set. So add a macro:_PAGE_LEAF instead of
(_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC), which is frequently used
to determine if it is a leaf page. This make code easier to read,
without any functional change.
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
#define pud_leaf pud_leaf
static inline int pud_leaf(pud_t pud)
{
- return pud_present(pud) &&
- (pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
+ return pud_present(pud) && (pud_val(pud) & _PAGE_LEAF);
}
static inline void set_pud(pud_t *pudp, pud_t pud)
#define _PAGE_CHG_MASK (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ | \
_PAGE_WRITE | _PAGE_EXEC | \
_PAGE_USER | _PAGE_GLOBAL))
+/*
+ * when all of R/W/X are zero, the PTE is a pointer to the next level
+ * of the page table; otherwise, it is a leaf PTE.
+ */
+#define _PAGE_LEAF (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)
#endif /* _ASM_RISCV_PGTABLE_BITS_H */
#define pmd_leaf pmd_leaf
static inline int pmd_leaf(pmd_t pmd)
{
- return pmd_present(pmd) &&
- (pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
+ return pmd_present(pmd) && (pmd_val(pmd) & _PAGE_LEAF);
}
static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
static inline int pte_huge(pte_t pte)
{
- return pte_present(pte)
- && (pte_val(pte) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
+ return pte_present(pte) && (pte_val(pte) & _PAGE_LEAF);
}
static inline int pte_dirty(pte_t pte)