s390/mm: align swapper_pg_dir to 16k

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The segment/region table that is part of the kernel image must be
properly aligned to 16k in order to make the crdte inline assembly
work.
Otherwise it will calculate a wrong segment/region table start address
and access incorrect memory locations if the swapper_pg_dir is not
aligned to 16k.

Therefore define BSS_FIRST_SECTIONS in order to put the swapper_pg_dir
at the beginning of the bss section and also align the bss section to
16k just like other architectures did.

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

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This commit is contained in:

Heiko Carstens 2016-05-28 10:03:55 +02:00 • committed by Martin Schwidefsky

parent 4b8fe77ace

commit 0ccb32c983

3 changed files with 10 additions and 3 deletions

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2

arch/s390/include/asm/pgtable.h

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9

arch/s390/kernel/vmlinux.lds.S

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2

arch/s390/mm/init.c

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