new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index dba965d..e7a147f 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -132,7 +132,7 @@
  */
 void ima_file_free(struct file *file)
 {
-	struct inode *inode = file->f_dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	struct integrity_iint_cache *iint;
 
 	if (!iint_initialized || !S_ISREG(inode->i_mode))
@@ -148,7 +148,7 @@
 static int process_measurement(struct file *file, const unsigned char *filename,
 			       int mask, int function)
 {
-	struct inode *inode = file->f_dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	struct integrity_iint_cache *iint;
 	unsigned char *pathname = NULL, *pathbuf = NULL;
 	int rc = -ENOMEM, action, must_appraise;