1 files changed, 13 insertions, 26 deletions

diff --git a/arch/csky/kernel/vdso.c b/arch/csky/kernel/vdso.c
index 2ca886e4a458..c54d019d66bc 100644
--- a/arch/csky/kernel/vdso.c
+++ b/arch/csky/kernel/vdso.c
@@ -8,23 +8,19 @@
 #include <linux/slab.h>
 
 #include <asm/page.h>
-#include <vdso/datapage.h>
 
 extern char vdso_start[], vdso_end[];
 
 static unsigned int vdso_pages;
 static struct page **vdso_pagelist;
 
-static union vdso_data_store vdso_data_store __page_aligned_data;
-struct vdso_data *vdso_data = vdso_data_store.data;
-
 static int __init vdso_init(void)
 {
 	unsigned int i;
 
 	vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;
 	vdso_pagelist =
-		kcalloc(vdso_pages + 1, sizeof(struct page *), GFP_KERNEL);
+		kcalloc(vdso_pages, sizeof(struct page *), GFP_KERNEL);
 	if (unlikely(vdso_pagelist == NULL)) {
 		pr_err("vdso: pagelist allocation failed\n");
 		return -ENOMEM;
@@ -36,7 +32,6 @@ static int __init vdso_init(void)
 		pg = virt_to_page(vdso_start + (i << PAGE_SHIFT));
 		vdso_pagelist[i] = pg;
 	}
-	vdso_pagelist[i] = virt_to_page(vdso_data);
 
 	return 0;
 }
@@ -45,11 +40,15 @@ arch_initcall(vdso_init);
 int arch_setup_additional_pages(struct linux_binprm *bprm,
 	int uses_interp)
 {
+	struct vm_area_struct *vma;
 	struct mm_struct *mm = current->mm;
 	unsigned long vdso_base, vdso_len;
 	int ret;
+	static struct vm_special_mapping vdso_mapping = {
+		.name = "[vdso]",
+	};
 
-	vdso_len = (vdso_pages + 1) << PAGE_SHIFT;
+	vdso_len = vdso_pages << PAGE_SHIFT;
 
 	mmap_write_lock(mm);
 	vdso_base = get_unmapped_area(NULL, 0, vdso_len, 0, 0);
@@ -65,33 +64,21 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
 	 */
 	mm->context.vdso = (void *)vdso_base;
 
-	ret =
-	   install_special_mapping(mm, vdso_base, vdso_pages << PAGE_SHIFT,
+	vdso_mapping.pages = vdso_pagelist;
+	vma =
+	   _install_special_mapping(mm, vdso_base, vdso_pages << PAGE_SHIFT,
 		(VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC),
-		vdso_pagelist);
+		&vdso_mapping);
 
-	if (unlikely(ret)) {
+	if (IS_ERR(vma)) {
+		ret = PTR_ERR(vma);
 		mm->context.vdso = NULL;
 		goto end;
 	}
 
 	vdso_base += (vdso_pages << PAGE_SHIFT);
-	ret = install_special_mapping(mm, vdso_base, PAGE_SIZE,
-		(VM_READ | VM_MAYREAD), &vdso_pagelist[vdso_pages]);
-
-	if (unlikely(ret))
-		mm->context.vdso = NULL;
+	ret = 0;
 end:
 	mmap_write_unlock(mm);
 	return ret;
 }
-
-const char *arch_vma_name(struct vm_area_struct *vma)
-{
-	if (vma->vm_mm && (vma->vm_start == (long)vma->vm_mm->context.vdso))
-		return "[vdso]";
-	if (vma->vm_mm && (vma->vm_start ==
-			   (long)vma->vm_mm->context.vdso + PAGE_SIZE))
-		return "[vdso_data]";
-	return NULL;
-}