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| author | Peter Zijlstra <peterz@infradead.org> | 2017-10-04 10:50:25 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-10-10 10:04:29 +0200 |
| commit | c7e2f69d3ed2e56de1f5eaaf37c0f5f91d7adb0a (patch) | |
| tree | 4c03ba202875cdcbe6c72fbc7a1f483af46f9c5c /lib | |
| parent | 8b405d5c5d0996d3d16f70c42744a0500f5b6ec3 (diff) | |
| download | linux-c7e2f69d3ed2e56de1f5eaaf37c0f5f91d7adb0a.tar.gz | |
locking/selftest: Avoid false BUG report
The work-around for the expected failure is providing another failure :/
Only when CONFIG_PROVE_LOCKING=y do we increment unexpected_testcase_failures,
so only then do we need to decrement, otherwise we'll end up with a negative
number and that will again trigger a BUG (printout, not crash).
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: d82fed752942 ("locking/lockdep/selftests: Fix mixed read-write ABBA tests")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/locking-selftest.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c index cd0b5c964bd0..2b827b8a1d8c 100644 --- a/lib/locking-selftest.c +++ b/lib/locking-selftest.c @@ -2031,11 +2031,13 @@ void locking_selftest(void) print_testname("mixed read-lock/lock-write ABBA"); pr_cont(" |"); dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK); +#ifdef CONFIG_PROVE_LOCKING /* * Lockdep does indeed fail here, but there's nothing we can do about * that now. Don't kill lockdep for it. */ unexpected_testcase_failures--; +#endif pr_cont(" |"); dotest(rwsem_ABBA1, FAILURE, LOCKTYPE_RWSEM); |