s390: lowcore stack pointer offsets

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Store the stack pointers in the lowcore for the kernel stack, the async
stack and the panic stack with the offset required for the first user.
This avoids an unnecessary add instruction on the system call path.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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This commit is contained in:

Martin Schwidefsky 2013-04-24 10:20:43 +02:00

parent b8668fd0a7

commit dc7ee00d47

4 changed files with 46 additions and 48 deletions

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36

arch/s390/kernel/entry.S

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34

arch/s390/kernel/entry64.S

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9

arch/s390/kernel/setup.c

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15

arch/s390/kernel/smp.c

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