Merge branch 'linus' into core/softlockup

2 files changed, 45 insertions, 7 deletions

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 8dc7109d61b7..efa4b363ce72 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -298,6 +298,14 @@ static int decrease_reservation(unsigned long nr_pages)
                 frame_list[i] = pfn_to_mfn(pfn);
 
                 scrub_page(page);
+
+                if (!PageHighMem(page)) {
+                        ret = HYPERVISOR_update_va_mapping(
+                                (unsigned long)__va(pfn << PAGE_SHIFT),
+                                __pte_ma(0), 0);
+                        BUG_ON(ret);
+                }
+
         }
 
         /* Ensure that ballooned highmem pages don't have kmaps. */
@@ -490,7 +498,7 @@ static ssize_t store_target_kb(struct sys_device *dev,
         if (!capable(CAP_SYS_ADMIN))
                 return -EPERM;
 
-        target_bytes = memparse(buf, &endchar);
+        target_bytes = simple_strtoull(buf, &endchar, 0) * 1024;
 
         balloon_set_new_target(target_bytes >> PAGE_SHIFT);
 
@@ -500,8 +508,39 @@ static ssize_t store_target_kb(struct sys_device *dev,
 static SYSDEV_ATTR(target_kb, S_IRUGO | S_IWUSR,
                    show_target_kb, store_target_kb);
 
+
+static ssize_t show_target(struct sys_device *dev, struct sysdev_attribute *attr,
+                              char *buf)
+{
+        return sprintf(buf, "%llu\n",
+                       (u64)balloon_stats.target_pages << PAGE_SHIFT);
+}
+
+static ssize_t store_target(struct sys_device *dev,
+                            struct sysdev_attribute *attr,
+                            const char *buf,
+                            size_t count)
+{
+        char *endchar;
+        unsigned long long target_bytes;
+
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+
+        target_bytes = memparse(buf, &endchar);
+
+        balloon_set_new_target(target_bytes >> PAGE_SHIFT);
+
+        return count;
+}
+
+static SYSDEV_ATTR(target, S_IRUGO | S_IWUSR,
+                   show_target, store_target);
+
+
 static struct sysdev_attribute *balloon_attrs[] = {
         &attr_target_kb,
+        &attr_target,
 };
 
 static struct attribute *balloon_info_attrs[] = {
diff --git a/drivers/xen/xenfs/xenbus.c b/drivers/xen/xenfs/xenbus.c
index 875a4c59c594..a9592d981b10 100644
--- a/drivers/xen/xenfs/xenbus.c
+++ b/drivers/xen/xenfs/xenbus.c
@@ -291,7 +291,7 @@ static void watch_fired(struct xenbus_watch *watch,
 static int xenbus_write_transaction(unsigned msg_type,
                                     struct xenbus_file_priv *u)
 {
-        int rc, ret;
+        int rc;
         void *reply;
         struct xenbus_transaction_holder *trans = NULL;
         LIST_HEAD(staging_q);
@@ -326,15 +326,14 @@ static int xenbus_write_transaction(unsigned msg_type,
         }
 
         mutex_lock(&u->reply_mutex);
-        ret = queue_reply(&staging_q, &u->u.msg, sizeof(u->u.msg));
-        if (!ret)
-                ret = queue_reply(&staging_q, reply, u->u.msg.len);
-        if (!ret) {
+        rc = queue_reply(&staging_q, &u->u.msg, sizeof(u->u.msg));
+        if (!rc)
+                rc = queue_reply(&staging_q, reply, u->u.msg.len);
+        if (!rc) {
                 list_splice_tail(&staging_q, &u->read_buffers);
                 wake_up(&u->read_waitq);
         } else {
                 queue_cleanup(&staging_q);
-                rc = ret;
         }
         mutex_unlock(&u->reply_mutex);