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2019-12-18s390/purgatory: do not build purgatory with kcov, kasan and friendsChristian Borntraeger1-0/+3
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>