s390/process: add missing header include
Add appropriate header file:
arch/s390/kernel/process.c:327:15: warning: symbol 'arch_align_stack' was not declared.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index cb4328e..5024be2 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -26,6 +26,7 @@
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/vtimer.h>
+#include <asm/exec.h>
#include <asm/irq.h>
#include <asm/nmi.h>
#include <asm/smp.h>