From patchwork series 394537

https://patchwork.ozlabs.org//project/linuxppc-dev/list/?series=394537

Author: Fox Snowpatch

arch/powerpc/include/asm/thread_info.h

@@ -14,7 +14,7 @@
 
 #ifdef __KERNEL__
 
-#ifdef CONFIG_KASAN
+#if defined(CONFIG_KASAN) && CONFIG_THREAD_SHIFT < 15
 #define MIN_THREAD_SHIFT	(CONFIG_THREAD_SHIFT + 1)
 #else
 #define MIN_THREAD_SHIFT	CONFIG_THREAD_SHIFT