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Sven Schnelle 5c09dbdfd4 s390: disable -Warray-bounds

[ Upstream commit 8b202ee218395319aec1ef44f72043e1fbaccdd6 ]

gcc-12 shows a lot of array bound warnings on s390. This is caused
by the S390_lowcore macro which uses a hardcoded address of 0.

Wrapping that with absolute_pointer() works, but gcc no longer knows
that a 12 bit displacement is sufficient to access lowcore. So it
emits instructions like 'lghi %r1,0; l %rx,xxx(%r1)' instead of a
single load/store instruction. As s390 stores variables often
read/written in lowcore, this is considered problematic. Therefore
disable -Warray-bounds on s390 for gcc-12 for the time being, until
there is a better solution.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Link: https://lore.kernel.org/r/yt9dzgkelelc.fsf@linux.ibm.com
Link: https://lore.kernel.org/r/20220422134308.1613610-1-svens@linux.ibm.com
Link: https://lore.kernel.org/r/20220425121742.3222133-1-svens@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2022-05-18 10:23:45 +02:00

appldata

s390/appldata: use struct_size() helper

2020-06-29 16:32:34 +02:00

boot

s390/boot: fix use of expolines in the DMA code

2021-07-28 14:35:42 +02:00

configs

s390: update defconfigs

2020-11-12 12:10:36 +01:00

crypto

s390/archrandom: add parameter check for s390_arch_random_generate