4 files changed, 6 insertions, 11 deletions
diff --git a/arch/um/Kconfig.um b/arch/um/Kconfig.um
index 50d6aa20c353..f8d1d0d47fe6 100644
--- a/arch/um/Kconfig.um
+++ b/arch/um/Kconfig.um
@@ -131,7 +131,7 @@ config NR_CPUS
 
 config HIGHMEM
 	bool "Highmem support (EXPERIMENTAL)"
-	depends on !64BIT && EXPERIMENTAL
+	depends on !64BIT && BROKEN
 	default n
 	help
 	  This was used to allow UML to run with big amounts of memory.
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 1664cce7b0ac..050e4ddbbb65 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -821,12 +821,12 @@ void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty,
 
 static void unregister_winch(struct tty_struct *tty)
 {
-	struct list_head *ele;
+	struct list_head *ele, *next;
 	struct winch *winch;
 
 	spin_lock(&winch_handler_lock);
 
-	list_for_each(ele, &winch_handlers) {
+	list_for_each_safe(ele, next, &winch_handlers) {
 		winch = list_entry(ele, struct winch, list);
 		if (winch->tty == tty) {
 			free_winch(winch, 1);
diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c
index 8501e7d0015c..7e0619c2c2c6 100644
--- a/arch/um/drivers/mmapper_kern.c
+++ b/arch/um/drivers/mmapper_kern.c
@@ -37,13 +37,7 @@ static ssize_t mmapper_write(struct file *file, const char __user *buf,
 	if (*ppos > mmapper_size)
 		return -EINVAL;
 
-	if (count > mmapper_size - *ppos)
-		count = mmapper_size - *ppos;
-
-	if (copy_from_user(&v_buf[*ppos], buf, count))
-		return -EFAULT;
-
-	return count;
+	return simple_write_to_buffer(v_buf, mmapper_size, ppos, buf, count);
 }
 
 static long mmapper_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
@@ -137,3 +131,4 @@ module_exit(mmapper_exit);
 
 MODULE_AUTHOR("Greg Lonnon <glonnon@ridgerun.com>");
 MODULE_DESCRIPTION("DSPLinux simulator mmapper driver");
+MODULE_LICENSE("GPL");
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 3d099f974785..1aee587e9c5d 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -31,7 +31,7 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
 	if (!pmd)
 		goto out_pmd;
 
-	pte = pte_alloc_map(mm, pmd, proc);
+	pte = pte_alloc_map(mm, NULL, pmd, proc);
 	if (!pte)
 		goto out_pte;