[PATCH -v2 09/10] m68k,mm: Fully initialize the page-table allocator

Peter Zijlstra
2020-01-31T12:56:11Z

Also iterate the PMD tables to populate the PTE table allocator. This
also fully replaces the previous zero_pgtable hack.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/m68k/mm/init.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

--- a/arch/m68k/mm/init.c
+++ b/arch/m68k/mm/init.c
@@ -120,7 +120,7 @@ void free_initmem(void)
static inline void init_pointer_tables(void)
{
#if defined(CONFIG_MMU) && !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
- int i;
+ int i, j;

/* insert pointer tables allocated so far into the tablelist */
init_pointer_table(kernel_pg_dir, TABLE_PGD);
@@ -133,6 +133,17 @@ static inline void init_pointer_tables(v

pmd_dir = (pmd_t *)pgd_page_vaddr(kernel_pg_dir[i]);
init_pointer_table(pmd_dir, TABLE_PMD);
+
+ for (j = 0; j < PTRS_PER_PMD; j++) {
+ pmd_t *pmd = &pmd_dir[j];
+ pte_t *pte_dir;
+
+ if (!pmd_present(*pmd))
+ continue;
+
+ pte_dir = (pte_t *)__pmd_page(*pmd);
+ init_pointer_table(pte_dir, TABLE_PTE);
+ }
}
#endif
}