1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c
index c6de566188e4..11b575f89856 100644
--- a/drivers/net/ppp_generic.c
+++ b/drivers/net/ppp_generic.c
@@ -83,7 +83,7 @@ struct ppp_file {
         int             dead;           /* unit/channel has been shut down */
 };
 
-#define PF_TO_X(pf, X)          ((X *)((char *)(pf) - offsetof(X, file)))
+#define PF_TO_X(pf, X)          container_of(pf, X, file)
 
 #define PF_TO_PPP(pf)           PF_TO_X(pf, struct ppp)
 #define PF_TO_CHANNEL(pf)       PF_TO_X(pf, struct channel)
@@ -834,7 +834,7 @@ static int ppp_unattached_ioctl(struct ppp_file *pf, struct file *file,
         return err;
 }
 
-static struct file_operations ppp_device_fops = {
+static const struct file_operations ppp_device_fops = {
         .owner          = THIS_MODULE,
         .read           = ppp_read,
         .write          = ppp_write,