In the linux-4.19.y kernel kcmp_test and compaction_test kselftest fails to compile. kcmp_test.c: In function ‘main’: kcmp_test.c:92:17: warning: implicit declaration of function ‘ksft_set_plan’ [-Wimplicit-function-declaration] 92 | ksft_set_plan(3); | ^~~~~~~~~~~~~ and compaction_test.c: In function ‘main’: compaction_test.c:186:9: warning: implicit declaration of function ‘ksft_set_plan’ [-Wimplicit-function-declaration] 186 | ksft_set_plan(1); | ^~~~~~~~~~~~~ The function definition for ksft_set_plan() is introduced by commit 5821ba969511 ("selftests: Add test plan API to kselftest.h and adjust callers") which is present from linux-5.2.y onwards. Samasth Norway Ananda (2): selftests/vm: remove call to ksft_set_plan() selftests/kcmp: remove call to ksft_set_plan() tools/testing/selftests/kcmp/kcmp_test.c | 1 - tools/testing/selftests/vm/compaction_test.c | 2 -- 2 files changed, 3 deletions(-) -- 2.45.2