more open-coded file_inode() calls

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/arc/kernel/troubleshoot.c

@@ -101,7 +101,7 @@ static void show_faulting_vma(unsigned long address, char *buf)
 		if (file) {
 			struct path *path = &file->f_path;
 			nm = d_path(path, buf, PAGE_SIZE - 1);
-			inode = vma->vm_file->f_path.dentry->d_inode;
+			inode = file_inode(vma->vm_file);
 			dev = inode->i_sb->s_dev;
 			ino = inode->i_ino;
 		}

drivers/staging/android/logger.c

@@ -696,7 +696,7 @@ static long logger_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			ret = -EBADF;
 			break;
 		}
-		if (!(in_egroup_p(file->f_dentry->d_inode->i_gid) ||
+		if (!(in_egroup_p(file_inode(file)->i_gid) ||
 				capable(CAP_SYSLOG))) {
 			ret = -EPERM;
 			break;

net/sunrpc/auth_gss/svcauth_gss.c

@@ -1330,7 +1330,7 @@ static int wait_for_gss_proxy(struct net *net, struct file *file)
 static ssize_t write_gssp(struct file *file, const char __user *buf,
 			 size_t count, loff_t *ppos)
 {
-	struct net *net = PDE_DATA(file->f_path.dentry->d_inode);
+	struct net *net = PDE_DATA(file_inode(file));
 	char tbuf[20];
 	unsigned long i;
 	int res;
@@ -1358,7 +1358,7 @@ static ssize_t write_gssp(struct file *file, const char __user *buf,
 static ssize_t read_gssp(struct file *file, char __user *buf,
 			 size_t count, loff_t *ppos)
 {
-	struct net *net = PDE_DATA(file->f_path.dentry->d_inode);
+	struct net *net = PDE_DATA(file_inode(file));
 	unsigned long p = *ppos;
 	char tbuf[10];
 	size_t len;