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Vasily Gorbik authored
s390 kasan code uses sclp_early_printk to report initialization failures. The code doing that should not be instrumented, because kasan shadow memory has not been set up yet. Even though sclp_early_core.c is compiled with instrumentation disabled it uses strlen function, which is instrumented and would produce shadow memory access if used. To avoid that, introduce uninstrumented __strlen function to be used instead. Before commit 7e0d92f0 ("s390/kasan: improve string/memory functions checks") few string functions (including strlen) were escaping kasan instrumentation due to usage of platform specific versions which are implemented in inline assembly. Fixes: 7e0d92f0 ("s390/kasan: improve string/memory functions checks") Acked-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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