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s390: clean up stacks setup

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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>
This commit is contained in:
Vasily Gorbik
2018-09-14 17:35:46 +02:00
committed by Martin Schwidefsky
parent 26f4414a45
commit 4e62d45885
5 changed files with 9 additions and 12 deletions
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3
arch/s390/boot/head.S
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@@ -311,7 +311,6 @@ ENTRY(startup_kdump)
spt 6f-.LPG0(%r13)
mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
l %r15,.Lstack-.LPG0(%r13)
ahi %r15,-STACK_FRAME_OVERHEAD
brasl %r14,verify_facilities
#ifdef CONFIG_KERNEL_UNCOMPRESSED
jg startup_continue
@@ -320,7 +319,7 @@ ENTRY(startup_kdump)
#endif
.Lstack:
.long 0x8000 + (1<<(PAGE_SHIFT+THREAD_SIZE_ORDER))
.long 0x8000 + THREAD_SIZE - STACK_FRAME_OVERHEAD
.align 8
6: .long 0x7fffffff,0xffffffff