Patch "xen/balloon: Fix declared-but-not-defined warning" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

    xen/balloon: Fix declared-but-not-defined warning

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     xen-balloon-fix-declared-but-not-defined-warning.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let [off-list ref] know about it.

From 842775f1509054ea969f1787f38d6a0ec2ccfaba Mon Sep 17 00:00:00 2001

From: Ross Lagerwall <redacted>
Date: Tue, 10 May 2016 10:27:54 +0100
Subject: xen/balloon: Fix declared-but-not-defined warning

From: Ross Lagerwall <redacted>

commit 842775f1509054ea969f1787f38d6a0ec2ccfaba upstream.

Fix a declared-but-not-defined warning when building with
XEN_BALLOON_MEMORY_HOTPLUG=n. This fixes a regression introduced by
commit dfd74a1edfab ("xen/balloon: Fix crash when ballooning on x86 32
bit PAE").

Signed-off-by: Ross Lagerwall <redacted>
Acked-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <redacted>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/xen/balloon.c |   28 +++++++++++++---------------
 1 file changed, 13 insertions(+), 15 deletions(-)

--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c

@@ -152,8 +152,6 @@ static DECLARE_WAIT_QUEUE_HEAD(balloon_w
 static void balloon_process(struct work_struct *work);
 static DECLARE_DELAYED_WORK(balloon_worker, balloon_process);
 
-static void release_memory_resource(struct resource *resource);
-
 /* When ballooning out (allocating memory to return to Xen) we don't really
    want the kernel to try too hard since that can trigger the oom killer. */
 #define GFP_BALLOON \

@@ -249,6 +247,19 @@ static enum bp_state update_schedule(enu
 }
 
 #ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
+static void release_memory_resource(struct resource *resource)
+{
+	if (!resource)
+		return;
+
+	/*
+	 * No need to reset region to identity mapped since we now
+	 * know that no I/O can be in this region
+	 */
+	release_resource(resource);
+	kfree(resource);
+}
+
 static struct resource *additional_memory_resource(phys_addr_t size)
 {
 	struct resource *res;

@@ -287,19 +298,6 @@ static struct resource *additional_memor
 	return res;
 }
 
-static void release_memory_resource(struct resource *resource)
-{
-	if (!resource)
-		return;
-
-	/*
-	 * No need to reset region to identity mapped since we now
-	 * know that no I/O can be in this region
-	 */
-	release_resource(resource);
-	kfree(resource);
-}
-
 static enum bp_state reserve_additional_memory(void)
 {
 	long credit;

Patches currently in stable-queue which might be from ross.lagerwall@citrix.com are

queue-4.4/xen-balloon-fix-declared-but-not-defined-warning.patch