xen: make avail_domheap_pages() inlined into get_outstanding_claims()

Function avail_domheap_pages() is only invoked by get_outstanding_claims(),
so it could be inlined into get_outstanding_claims().
Move up avail_heap_pages() to avoid declaration before
get_outstanding_claims().

Signed-off-by: Penny Zheng <Penny.Zheng@amd.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

xen/common/page_alloc.c

@@ -488,6 +488,27 @@ static long total_avail_pages;
 static DEFINE_SPINLOCK(heap_lock);
 static long outstanding_claims; /* total outstanding claims by all domains */
 
+static unsigned long avail_heap_pages(
+    unsigned int zone_lo, unsigned int zone_hi, unsigned int node)
+{
+    unsigned int i, zone;
+    unsigned long free_pages = 0;
+
+    if ( zone_hi >= NR_ZONES )
+        zone_hi = NR_ZONES - 1;
+
+    for_each_online_node(i)
+    {
+        if ( !avail[i] )
+            continue;
+        for ( zone = zone_lo; zone <= zone_hi; zone++ )
+            if ( (node == -1) || (node == i) )
+                free_pages += avail[i][zone];
+    }
+
+    return free_pages;
+}
+
 unsigned long domain_adjust_tot_pages(struct domain *d, long pages)
 {
     ASSERT(rspin_is_locked(&d->page_alloc_lock));
@@ -584,7 +605,7 @@ void get_outstanding_claims(uint64_t *free_pages, uint64_t *outstanding_pages)
 {
     spin_lock(&heap_lock);
     *outstanding_pages = outstanding_claims;
-    *free_pages =  avail_domheap_pages();
+    *free_pages = avail_heap_pages(MEMZONE_XEN + 1, NR_ZONES - 1, -1);
     spin_unlock(&heap_lock);
 }
 
@@ -1962,27 +1983,6 @@ static void init_heap_pages(
     }
 }
 
-static unsigned long avail_heap_pages(
-    unsigned int zone_lo, unsigned int zone_hi, unsigned int node)
-{
-    unsigned int i, zone;
-    unsigned long free_pages = 0;
-
-    if ( zone_hi >= NR_ZONES )
-        zone_hi = NR_ZONES - 1;
-
-    for_each_online_node(i)
-    {
-        if ( !avail[i] )
-            continue;
-        for ( zone = zone_lo; zone <= zone_hi; zone++ )
-            if ( (node == -1) || (node == i) )
-                free_pages += avail[i][zone];
-    }
-
-    return free_pages;
-}
-
 /*************************
  * COLORED SIDE-ALLOCATOR
  *
@@ -2796,13 +2796,6 @@ unsigned long avail_domheap_pages_region(
     return avail_heap_pages(zone_lo, zone_hi, node);
 }
 
-unsigned long avail_domheap_pages(void)
-{
-    return avail_heap_pages(MEMZONE_XEN + 1,
-                            NR_ZONES - 1,
-                            -1);
-}
-
 unsigned long avail_node_heap_pages(unsigned int nodeid)
 {
     return avail_heap_pages(MEMZONE_XEN, NR_ZONES -1, nodeid);

xen/include/xen/mm.h

@@ -141,7 +141,6 @@ struct page_info *alloc_domheap_pages(
 void free_domheap_pages(struct page_info *pg, unsigned int order);
 unsigned long avail_domheap_pages_region(
     unsigned int node, unsigned int min_width, unsigned int max_width);
-unsigned long avail_domheap_pages(void);
 unsigned long avail_node_heap_pages(unsigned int nodeid);
 #define alloc_domheap_page(d,f) (alloc_domheap_pages(d,0,f))
 #define free_domheap_page(p)  (free_domheap_pages(p,0))