disable cpu isolcpus

hc

2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394

 kernel/tools/testing/selftests/rseq/.gitignore
..
..
@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 basic_percpu_ops_test
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 basic_test
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 basic_rseq_op_test