s390: fix DAT off memory access, e.g. on kdump

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commit 204ee2c564 ("s390/irqflags: optimize irq restore") optimized
irqrestore to really only care about interrupts and adapted the
remaining low level users. One spot (memcpy_real) was not touched,
though - fix it. Otherwise a kdump kernel will fail while reading
the old kernel. As we re-enable irqs with a non-standard function
we have to tell lockdep about that.

Fixes: 204ee2c564 ("s390/irqflags: optimize irq restore")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Christian Borntraeger 2016-02-09 16:23:39 +01:00 • committed by Martin Schwidefsky

parent 232f5dd785

commit 0986d97741

1 changed files with 3 additions and 1 deletions

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arch/s390/mm/maccess.c

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