kselftest: Fix vdso_test_abi return status
vdso_test_abi contains a batch of tests that verify the validity of the vDSO ABI. When a vDSO symbol is not found the relevant test is skipped reporting KSFT_SKIP. All the tests return values are then added in a single variable which is checked to verify failures. This approach can have side effects which result in reporting the wrong kselftest exit status. Fix vdso_test_abi verifying the return code of each test separately. Cc: Shuah Khan <shuah@kernel.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Reported-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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