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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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2
arch/s390/include/asm/ptrace.h
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@@ -313,8 +313,6 @@ typedef struct
#ifdef __KERNEL__
#include <asm/setup.h>
#include <asm/page.h>
/*
* The pt_regs struct defines the way the registers are stored on