s390/mm: fix memory leak of ptlock in pmd_free_tlb

The pmd_free_tlb function fails to call pgtable_pmd_page_dtor.
Without the call the ptlock for the pmd tables will not be freed.
Add the missing call.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h
index 572c5994900424c2fe4524a17aa02b3bdbe07803..06d8741ad6f42e2b131b707f165548c5f54d4ed0 100644 (file)
--- a/arch/s390/include/asm/tlb.h
+++ b/arch/s390/include/asm/tlb.h
@@ -121,6 +121,7 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
 #ifdef CONFIG_64BIT
        if (tlb->mm->context.asce_limit <= (1UL << 31))
                return;
+       pgtable_pmd_page_dtor(virt_to_page(pmd));
        tlb_remove_table(tlb, pmd);
 #endif
 }