diff --git a/repos/dde_linux/src/lib/lx_emul/shadow/mm/page_alloc.c b/repos/dde_linux/src/lib/lx_emul/shadow/mm/page_alloc.c
index 2e6c2a6f9c..b71812db0e 100644
--- a/repos/dde_linux/src/lib/lx_emul/shadow/mm/page_alloc.c
+++ b/repos/dde_linux/src/lib/lx_emul/shadow/mm/page_alloc.c
@@ -12,6 +12,7 @@
  */
 
 #include <linux/gfp.h>
+#include <linux/mm.h>
 #include <linux/version.h>
 #include <lx_emul/alloc.h>
 #include <lx_emul/debug.h>
@@ -41,11 +42,9 @@ unsigned long __alloc_pages_bulk(gfp_t gfp,int preferred_nid,
 	return nr_pages;
 }
 
-
-void __free_pages(struct page * page, unsigned int order)
+static void lx_free_pages(struct page *page, unsigned const num_pages)
 {
 	unsigned i;
-	unsigned const num_pages = (1 << order);
 	void *   const virt_addr = page->virtual;
 
 	if (atomic_read(&page->_refcount) && !atomic_dec_and_test(&page->_refcount))
@@ -59,15 +58,20 @@ void __free_pages(struct page * page, unsigned int order)
 }
 
 
-/*
- * In earlier kernel versions, '__alloc_pages' was an inline function.
- */
-#if LINUX_VERSION_CODE > KERNEL_VERSION(5,12,0)
-struct page * __alloc_pages(gfp_t gfp, unsigned int order, int preferred_nid,
-                            nodemask_t * nodemask)
+void __free_pages(struct page * page, unsigned int order)
 {
-	unsigned const nr_pages = (1u << order);
+	lx_free_pages(page, (1u << order));
+}
 
+
+void free_pages_exact(void *virt_addr, size_t size)
+{
+	lx_free_pages(virt_to_page(virt_addr), PAGE_ALIGN(size) / PAGE_SIZE);
+}
+
+
+static struct page * lx_alloc_pages(unsigned const nr_pages)
+{
 	void const  *ptr  = lx_emul_mem_alloc_aligned(PAGE_SIZE*nr_pages, PAGE_SIZE);
 	struct page *page = lx_emul_virt_to_pages(ptr, nr_pages);
 
@@ -75,4 +79,20 @@ struct page * __alloc_pages(gfp_t gfp, unsigned int order, int preferred_nid,
 
 	return page;
 }
+
+/*
+ * In earlier kernel versions, '__alloc_pages' was an inline function.
+ */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(5,12,0)
+struct page * __alloc_pages(gfp_t gfp, unsigned int order, int preferred_nid,
+                            nodemask_t * nodemask)
+{
+	return lx_alloc_pages(1u << order);
+}
 #endif
+
+
+void *alloc_pages_exact(size_t size, gfp_t gfp_mask)
+{
+	return lx_alloc_pages(PAGE_ALIGN(size) / PAGE_SIZE)->virtual;
+}