s390/facility: Disable compile time optimization for decompressor code

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[ Upstream commit 0147addc4f ]

Disable compile time optimizations of test_facility() for the
decompressor. The decompressor should not contain any optimized code
depending on the architecture level set the kernel image is compiled
for to avoid unexpected operation exceptions.

Add a __DECOMPRESSOR check to test_facility() to enforce that
facilities are always checked during runtime for the decompressor.

Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Heiko Carstens 2024-09-04 11:39:24 +02:00 • committed by Greg Kroah-Hartman

parent c43622d6f9

commit 78cddbd775

1 changed files with 4 additions and 2 deletions

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arch/s390/include/asm/facility.h

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