s390/mm: correct pgtable_bytes on page table downgrade
The downgrade of a page table from 3 levels to 2 levels for a 31-bit compat process removes a pmd table which has to be counted against pgtable_bytes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -131,6 +131,7 @@ void crst_table_downgrade(struct mm_struct *mm)
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pgd = mm->pgd;
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mm_dec_nr_pmds(mm);
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mm->pgd = (pgd_t *) (pgd_val(*pgd) & _REGION_ENTRY_ORIGIN);
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mm->context.asce_limit = _REGION3_SIZE;
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mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
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