---

yaml
---
r: 68519
b: refs/heads/master
c: 98b830d
h: refs/heads/master
i:
  68517: 684571f
  68515: 645a29c
  68511: e6c1ba5
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 241651d04d672fb685b2874707016cbbf95931e5
+refs/heads/master: 98b830d26095007aeb04041147b93d2b74e0a0c0

trunk/drivers/mtd/nand/nandsim.c

@@ -1272,7 +1272,13 @@ static int prog_page(struct nandsim *ns, int num)
 	mypage = NS_GET_PAGE(ns);
 	if (mypage->byte == NULL) {
 		NS_DBG("prog_page: allocating page %d\n", ns->regs.row);
-		mypage->byte = kmalloc(ns->geom.pgszoob, GFP_KERNEL);
+		/*
+		 * We allocate memory with GFP_NOFS because a flash FS may
+		 * utilize this. If it is holding an FS lock, then gets here,
+		 * then kmalloc runs writeback which goes to the FS again
+		 * and deadlocks. This was seen in practice.
+		 */
+		mypage->byte = kmalloc(ns->geom.pgszoob, GFP_NOFS);
 		if (mypage->byte == NULL) {
 			NS_ERR("prog_page: error allocating memory for page %d\n", ns->regs.row);
 			return -1;