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authorVasily Gorbik <gor@linux.ibm.com>2018-09-14 17:35:46 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2018-09-20 13:20:29 +0200
commit4e62d458850069c9f05e03f99be1a817967e201f (patch)
tree36930d2ada8892e0b888c1cddcf9cba830b36c33 /arch/s390/kernel/head64.S
parent26f4414a45b808f83d42d6fd2fbf4a59ef25e84b (diff)
s390: clean up stacks setup
Replace hard coded stack frame overhead values with STACK_FRAME_OVERHEAD definition. Avoid unnecessary arithmetic instructions. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/head64.S')
-rw-r--r--arch/s390/kernel/head64.S6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 6d14ad42ba88..b31dfb102700 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -14,6 +14,7 @@
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#include <asm/page.h>
+#include <asm/ptrace.h>
__HEAD
ENTRY(startup_continue)
@@ -35,10 +36,9 @@ ENTRY(startup_continue)
#
larl %r14,init_task
stg %r14,__LC_CURRENT
- larl %r15,init_thread_union
- aghi %r15,1<<(PAGE_SHIFT+THREAD_SIZE_ORDER) # init_task_union + THREAD_SIZE
+ larl %r15,init_thread_union+THREAD_SIZE
stg %r15,__LC_KERNEL_STACK # set end of kernel stack
- aghi %r15,-160
+ aghi %r15,-STACK_FRAME_OVERHEAD
#
# Early setup functions that may not rely on an initialized bss section,
# like moving the initrd. Returns with an initialized bss section.