[PATCH] severing poll.h -> mm.h

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 091a11c..20dc3be 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -21,6 +21,7 @@
 #include <linux/fcntl.h>
 #include <linux/init.h>
 #include <linux/poll.h>
+#include <linux/mm.h>
 #include <linux/proc_fs.h>
 #include <linux/spinlock.h>
 #include <linux/sysctl.h>