x86/kasan, mm: Introduce generic kasan_populate_zero_shadow()

[mirror_ubuntu-bionic-kernel.git] / include / linux / kasan.h

diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index 5486d777b706edeb20db7782e27ff12b6a558945..4b9f85c963d0738e20ee7c89e2dcb28ba3cc1aaa 100644 (file)
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -10,11 +10,19 @@ struct vm_struct;
 #ifdef CONFIG_KASAN
 
 #define KASAN_SHADOW_SCALE_SHIFT 3
-#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
 
 #include <asm/kasan.h>
+#include <asm/pgtable.h>
 #include <linux/sched.h>
 
+extern unsigned char kasan_zero_page[PAGE_SIZE];
+extern pte_t kasan_zero_pte[PTRS_PER_PTE];
+extern pmd_t kasan_zero_pmd[PTRS_PER_PMD];
+extern pud_t kasan_zero_pud[PTRS_PER_PUD];
+
+void kasan_populate_zero_shadow(const void *shadow_start,
+                               const void *shadow_end);
+
 static inline void *kasan_mem_to_shadow(const void *addr)
 {
        return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT)