s390/mm: fix mapping of read-only kernel text section

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Within the identity mapping the kernel text section is mapped read-only.
However when mapping the first and last page of the text section we must
round upwards and downwards respectively, if only parts of a page belong
to the section.
Otherwise potential rw data can be mapped read-only. So the rounding must
be done just the other way we have it right now.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Heiko Carstens 2012-10-04 17:02:02 +02:00 • committed by Martin Schwidefsky

parent e76e82d772

commit 8fe234d3c8

1 changed files with 2 additions and 2 deletions

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arch/s390/mm/vmem.c

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