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m68k: mm: Fully initialize the page-table allocator

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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>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20200131125403.938797587@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Peter Zijlstra 2020-01-31 13:45:40 +01:00 committed by Geert Uytterhoeven
parent 0e071ee681
commit 518a6b5824
1 changed files with 12 additions and 1 deletions
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13
arch/m68k/mm/init.c
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@ -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(void)
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
}