Merge tag 'for-linus-4.17-ofs' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs updates from Mike Marshall:
 "Fixes and cleanups:

   - Documentation cleanups

   - removal of unused code

   - make some structs static

   - implement Orangefs vm_operations fault callout

   - eliminate two single-use functions and put their cleaned up code in
     line.

   - replace a vmalloc/memset instance with vzalloc

   - fix a race condition bug in wait code"

* tag 'for-linus-4.17-ofs' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  Orangefs: documentation updates
  orangefs: document package install and xfstests procedure
  orangefs: remove unused code
  orangefs: make several *_operations structs static
  orangefs: implement vm_ops->fault
  orangefs: open code short single-use functions
  orangefs: replace vmalloc and memset with vzalloc
  orangefs: bug fix for a race condition when getting a slot

1 files changed, 27 insertions, 28 deletions

diff --git a/fs/orangefs/devorangefs-req.c b/fs/orangefs/devorangefs-req.c
index b03057afac2a..66369ec90020 100644
--- a/fs/orangefs/devorangefs-req.c
+++ b/fs/orangefs/devorangefs-req.c
@@ -463,11 +463,10 @@ static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb,
 	if (op->downcall.type != ORANGEFS_VFS_OP_READDIR)
 		goto wakeup;
 
-	op->downcall.trailer_buf = vmalloc(op->downcall.trailer_size);
+	op->downcall.trailer_buf = vzalloc(op->downcall.trailer_size);
 	if (!op->downcall.trailer_buf)
 		goto Enomem;
 
-	memset(op->downcall.trailer_buf, 0, op->downcall.trailer_size);
 	if (!copy_from_iter_full(op->downcall.trailer_buf,
 			         op->downcall.trailer_size, iter)) {
 		gossip_err("%s: failed to copy trailer.\n", __func__);
@@ -779,9 +778,35 @@ static long orangefs_devreq_compat_ioctl(struct file *filp, unsigned int cmd,
 
 #endif /* CONFIG_COMPAT is in .config */
 
+static __poll_t orangefs_devreq_poll(struct file *file,
+				      struct poll_table_struct *poll_table)
+{
+	__poll_t poll_revent_mask = 0;
+
+	poll_wait(file, &orangefs_request_list_waitq, poll_table);
+
+	if (!list_empty(&orangefs_request_list))
+		poll_revent_mask |= EPOLLIN;
+	return poll_revent_mask;
+}
+
 /* the assigned character device major number */
 static int orangefs_dev_major;
 
+static const struct file_operations orangefs_devreq_file_operations = {
+	.owner = THIS_MODULE,
+	.read = orangefs_devreq_read,
+	.write_iter = orangefs_devreq_write_iter,
+	.open = orangefs_devreq_open,
+	.release = orangefs_devreq_release,
+	.unlocked_ioctl = orangefs_devreq_ioctl,
+
+#ifdef CONFIG_COMPAT		/* CONFIG_COMPAT is in .config */
+	.compat_ioctl = orangefs_devreq_compat_ioctl,
+#endif
+	.poll = orangefs_devreq_poll
+};
+
 /*
  * Initialize orangefs device specific state:
  * Must be called at module load time only
@@ -814,29 +839,3 @@ void orangefs_dev_cleanup(void)
 		     "*** /dev/%s character device unregistered ***\n",
 		     ORANGEFS_REQDEVICE_NAME);
 }
-
-static __poll_t orangefs_devreq_poll(struct file *file,
-				      struct poll_table_struct *poll_table)
-{
-	__poll_t poll_revent_mask = 0;
-
-	poll_wait(file, &orangefs_request_list_waitq, poll_table);
-
-	if (!list_empty(&orangefs_request_list))
-		poll_revent_mask |= EPOLLIN;
-	return poll_revent_mask;
-}
-
-const struct file_operations orangefs_devreq_file_operations = {
-	.owner = THIS_MODULE,
-	.read = orangefs_devreq_read,
-	.write_iter = orangefs_devreq_write_iter,
-	.open = orangefs_devreq_open,
-	.release = orangefs_devreq_release,
-	.unlocked_ioctl = orangefs_devreq_ioctl,
-
-#ifdef CONFIG_COMPAT		/* CONFIG_COMPAT is in .config */
-	.compat_ioctl = orangefs_devreq_compat_ioctl,
-#endif
-	.poll = orangefs_devreq_poll
-};