Commit 814cedbc authored Nov 27, 2018 by Martin Schwidefsky

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>

parent 104f708f

arch/s390/mm/pgalloc.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -131,6 +131,7 @@ void crst_table_downgrade(struct mm_struct *mm)
		}

		pgd = mm->pgd;
		mm_dec_nr_pmds(mm);
		mm->pgd = (pgd_t ) (pgd_val(pgd) & _REGION_ENTRY_ORIGIN);
		mm->context.asce_limit = _REGION3_SIZE;
		mm->context.asce = __pa(mm->pgd) \| _ASCE_TABLE_LENGTH \|

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