riscv: Use macro definition instead of magic number

The KERN_VIRT_START defines the start virtual address of kernel space.
Use this macro instead of magic number.

Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

diff --git a/arch/riscv/include/asm/kasan.h b/arch/riscv/include/asm/kasan.h
index eee6e65..b47045c 100644 (file)
--- a/arch/riscv/include/asm/kasan.h
+++ b/arch/riscv/include/asm/kasan.h
@@ -13,7 +13,7 @@
 #define KASAN_SHADOW_SCALE_SHIFT       3
 
 #define KASAN_SHADOW_SIZE      (UL(1) << (38 - KASAN_SHADOW_SCALE_SHIFT))
-#define KASAN_SHADOW_START     0xffffffc000000000 /* 2^64 - 2^38 */
+#define KASAN_SHADOW_START     KERN_VIRT_START /* 2^64 - 2^38 */
 #define KASAN_SHADOW_END       (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
 
 #define KASAN_SHADOW_OFFSET    (KASAN_SHADOW_END - (1ULL << \