um: Call pgtable_pmd_page_dtor() in __pmd_free_tlb()

Commit b2b29d6 ("mm: account PMD tables like PTE tables") uncovered a bug in uml, we forgot to call the destructor. While we are here, give x a sane name. Reported-by: Anton Ivanov <[email protected]> Co-developed-by: Matthew Wilcox (Oracle) <[email protected]> Signed-off-by: Richard Weinberger <[email protected]> Tested-by: Christopher Obbard <[email protected]>
EttusResearch · Nov 10, 2020 · 9a5085b · 9a5085b
1 parent eccc876
commit 9a5085b
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/arch/um/include/asm/pgalloc.h b/arch/um/include/asm/pgalloc.h
@@ -33,7 +33,13 @@ do {							\
 } while (0)
 
 #ifdef CONFIG_3_LEVEL_PGTABLES
-#define __pmd_free_tlb(tlb,x, address)   tlb_remove_page((tlb),virt_to_page(x))
+
+#define __pmd_free_tlb(tlb, pmd, address)		\
+do {							\
+	pgtable_pmd_page_dtor(virt_to_page(pmd));	\
+	tlb_remove_page((tlb),virt_to_page(pmd));	\
+} while (0)						\
+
 #endif
 
 #endif