---

yaml
---
r: 14059
b: refs/heads/master
c: cbc24af
h: refs/heads/master
i:
  14057: b000cfc
  14055: 6deb8b1
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2ab23c95a0b77d45dc764dd4aed48fe6e8906e59
+refs/heads/master: cbc24afa82106b67df804cb434739e4382eecd9a

trunk/arch/um/kernel/trap_kern.c

@@ -95,7 +95,16 @@ int handle_page_fault(unsigned long address, unsigned long ip,
 		pte = pte_offset_kernel(pmd, address);
 	} while(!pte_present(*pte));
 	err = 0;
+	/* The below warning was added in place of
+	 *	pte_mkyoung(); if (is_write) pte_mkdirty();
+	 * If it's triggered, we'd see normally a hang here (a clean pte is
+	 * marked read-only to emulate the dirty bit).
+	 * However, the generic code can mark a PTE writable but clean on a
+	 * concurrent read fault, triggering this harmlessly. So comment it out.
+	 */
+#if 0
 	WARN_ON(!pte_young(*pte) || (is_write && !pte_dirty(*pte)));
+#endif
 	flush_tlb_page(vma, address);
 out:
 	up_read(&mm->mmap_sem);