1 files changed, 3 insertions, 18 deletions

diff --git a/mm/nommu.c b/mm/nommu.c
index 3abd0845bda..4462b6a3fcb 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -104,21 +104,15 @@ EXPORT_SYMBOL(vmtruncate);
 unsigned int kobjsize(const void *objp)
 {
         struct page *page;
-        int order = 0;
 
         /*
          * If the object we have should not have ksize performed on it,
          * return size of 0
          */
-        if (!objp)
-                return 0;
-
-        if ((unsigned long)objp >= memory_end)
+        if (!objp || !virt_addr_valid(objp))
                 return 0;
 
         page = virt_to_head_page(objp);
-        if (!page)
-                return 0;
 
         /*
          * If the allocator sets PageSlab, we know the pointer came from
@@ -129,18 +123,9 @@ unsigned int kobjsize(const void *objp)
 
         /*
          * The ksize() function is only guaranteed to work for pointers
-         * returned by kmalloc(). So handle arbitrary pointers, that we expect
-         * always to be compound pages, here.
-         */
-        if (PageCompound(page))
-                order = compound_order(page);
-
-        /*
-         * Finally, handle arbitrary pointers that don't set PageSlab.
-         * Default to 0-order in the case when we're unable to ksize()
-         * the object.
+         * returned by kmalloc(). So handle arbitrary pointers here.
          */
-        return PAGE_SIZE << order;
+        return PAGE_SIZE << compound_order(page);
 }
 
 /*