Commit f1be77bb authored Jan 31, 2011 by Martin Schwidefsky Committed by Martin Schwidefsky Jan 31, 2011

[S390] pgtable_list corruption

After page_table_free_rcu removed a page from the pgtable_list
page_table_free better not add it again. Otherwise a page_table_alloc
can reuse a page table fragment that is still in the rcu process.

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

parent f602f6d6

arch/s390/mm/pgtable.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -336,6 +336,7 @@ void page_table_free(struct mm_struct mm, unsigned long table)
		page->flags ^= bits;
		if (page->flags & FRAG_MASK) {
		/* Page now has some free pgtable fragments. */
		if (!list_empty(&page->lru))
		list_move(&page->lru, &mm->context.pgtable_list);
		page = NULL;
		} else