s390/boot: replace magic string check with a bootdata flag

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The magic string "S390EP" at offset 0x10008 indicated to the decompressed
kernel that it was booted by the decompressor. Introduce a new bootdata
flag instead which conveys the same information in an explicit and
a cleaner way. But keep the magic string because it is a kernel ABI.

Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Alexander Egorenkov 2021-03-25 12:10:56 +01:00 • committed by Vasily Gorbik

parent 549abb7f36

commit 9f744abb46

3 changed files with 6 additions and 1 deletions

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1

arch/s390/boot/startup.c

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2

arch/s390/include/asm/setup.h

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4

arch/s390/kernel/early.c

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