x86/purgatory: disable KMSAN instrumentation
The stand-alone purgatory.ro does not contain the KMSAN runtime, therefore it can't be built with KMSAN compiler instrumentation. Link: https://lkml.kernel.org/r/20221024212144.2852069-2-glider@google.com Link: https://github.com/google/kmsan/issues/89Signed-off-by: Alexander Potapenko <glider@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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