[PATCH v2] xen/balloon: Fix declared-but-not-defined warning

From: Ross Lagerwall
Date: Tue May 10 2016 - 05:28:25 EST


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 <ross.lagerwall@xxxxxxxxxx>
---
v2: Moved function instead of adding a prototype.

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

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index d46839f..e4db19e 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -151,8 +151,6 @@ static DECLARE_WAIT_QUEUE_HEAD(balloon_wq);
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 \
@@ -248,6 +246,19 @@ static enum bp_state update_schedule(enum bp_state state)
}

#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;
@@ -286,19 +297,6 @@ static struct resource *additional_memory_resource(phys_addr_t size)
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;
--
2.4.11