s390/sclp: reserve memory occupied by sclp early buffer

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The memory block occupied by the SCLP early buffer that is allocated
by the decompressor and then handed over to the decompressed kernel,
must be reserved to prevent it from being reused for other purposes.
This is necessary because the SCLP early buffer is still in use
during kernel initialization.

Fixes: f1d3c53237 ("s390/boot: move sclp early buffer from fixed address in asm to C")
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reported-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Alexander Egorenkov 2021-08-10 15:20:00 +02:00 • committed by Vasily Gorbik

parent 8617bb7400

commit 7c0eaa78b9

3 changed files with 3 additions and 2 deletions

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2

arch/s390/include/asm/sclp.h

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1

arch/s390/kernel/setup.c

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2

drivers/s390/char/sclp.h

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