1 files changed, 4 insertions, 0 deletions

diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
index cf83f2d7e2a5..a1deed85f31d 100644
--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h
@@ -81,6 +81,10 @@ extern struct task_struct *last_task_used_altivec;
 extern struct task_struct *last_task_used_spe;
 
 #ifdef CONFIG_PPC32
+
+#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
+#error User TASK_SIZE overlaps with KERNEL_START address
+#endif
 #define TASK_SIZE       (CONFIG_TASK_SIZE)
 
 /* This decides where the kernel will search for a free chunk of vm