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[S390] s390: move machine flags to lowcore

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Currently the storage of the machine flags is a globally exported unsigned
long long variable. By moving the storage location into the lowcore struct we
allow assembler code to check machine_flags directly even without needing a
register. Addtionally the lowcore and therefore the machine flags too will be
in cache most of the time.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Christian Ehrhardt
2009-04-14 15:36:16 +02:00
committed by Martin Schwidefsky
parent b21597d026
commit 25097bf153
10 changed files with 56 additions and 36 deletions
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3
arch/s390/include/asm/thread_info.h
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@@ -31,8 +31,9 @@
#define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER)
#ifndef __ASSEMBLY__
#include <asm/processor.h>
#include <asm/lowcore.h>
#include <asm/page.h>
#include <asm/processor.h>
/*
* low level task data that entry.S needs immediate access to