s390/purgatory: do not build purgatory with kcov, kasan and friends
[ Upstream commit c23587c9 ] the purgatory must not rely on functions from the "old" kernel, so we must disable kasan and friends. We also need to have a separate copy of string.c as the default does not build memcmp with KASAN. Reported-by:kbuild test robot <lkp@intel.com> Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by:
Vasily Gorbik <gor@linux.ibm.com> Signed-off-by:
Vasily Gorbik <gor@linux.ibm.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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5ee6f0da
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