[S390] vmemmap: use clear_table to initialise page tables.

Always use clear_table to initialise page tables. The overlapping
memcpy is just a leftover of a previous version that wasn't fully
converted to clear_table.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 35d90a4..3ffc021 100644 (file)
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -77,8 +77,7 @@ static inline pud_t *vmem_pud_alloc(void)
        pud = vmem_alloc_pages(2);
        if (!pud)
                return NULL;
-       pud_val(*pud) = _REGION3_ENTRY_EMPTY;
-       memcpy(pud + 1, pud, (PTRS_PER_PUD - 1)*sizeof(pud_t));
+       clear_table((unsigned long *) pud, _REGION3_ENTRY_EMPTY, PAGE_SIZE * 4);
 #endif
        return pud;
 }
@@ -91,7 +90,7 @@ static inline pmd_t *vmem_pmd_alloc(void)
        pmd = vmem_alloc_pages(2);
        if (!pmd)
                return NULL;
-       clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE*4);
+       clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE * 4);
 #endif
        return pmd;
 }