1 files changed, 16 insertions, 7 deletions

diff --git a/kernel/resource.c b/kernel/resource.c
index 78b087221c15..fb11a58b9594 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -223,13 +223,13 @@ int release_resource(struct resource *old)
 
 EXPORT_SYMBOL(release_resource);
 
-#if defined(CONFIG_MEMORY_HOTPLUG) && !defined(CONFIG_ARCH_HAS_WALK_MEMORY)
+#if !defined(CONFIG_ARCH_HAS_WALK_MEMORY)
 /*
  * Finds the lowest memory reosurce exists within [res->start.res->end)
- * the caller must specify res->start, res->end, res->flags.
+ * the caller must specify res->start, res->end, res->flags and "name".
  * If found, returns 0, res is overwritten, if not found, returns -1.
  */
-static int find_next_system_ram(struct resource *res)
+static int find_next_system_ram(struct resource *res, char *name)
 {
         resource_size_t start, end;
         struct resource *p;
@@ -245,6 +245,8 @@ static int find_next_system_ram(struct resource *res)
                 /* system ram is just marked as IORESOURCE_MEM */
                 if (p->flags != res->flags)
                         continue;
+                if (name && strcmp(p->name, name))
+                        continue;
                 if (p->start > end) {
                         p = NULL;
                         break;
@@ -262,19 +264,26 @@ static int find_next_system_ram(struct resource *res)
                 res->end = p->end;
         return 0;
 }
-int
-walk_memory_resource(unsigned long start_pfn, unsigned long nr_pages, void *arg,
-                        int (*func)(unsigned long, unsigned long, void *))
+
+/*
+ * This function calls callback against all memory range of "System RAM"
+ * which are marked as IORESOURCE_MEM and IORESOUCE_BUSY.
+ * Now, this function is only for "System RAM".
+ */
+int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
+                void *arg, int (*func)(unsigned long, unsigned long, void *))
 {
         struct resource res;
         unsigned long pfn, len;
         u64 orig_end;
         int ret = -1;
+
         res.start = (u64) start_pfn << PAGE_SHIFT;
         res.end = ((u64)(start_pfn + nr_pages) << PAGE_SHIFT) - 1;
         res.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
         orig_end = res.end;
-        while ((res.start < res.end) && (find_next_system_ram(&res) >= 0)) {
+        while ((res.start < res.end) &&
+                (find_next_system_ram(&res, "System RAM") >= 0)) {
                 pfn = (unsigned long)(res.start >> PAGE_SHIFT);
                 len = (unsigned long)((res.end + 1 - res.start) >> PAGE_SHIFT);
                 ret = (*func)(pfn, len, arg);