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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2017-04-05 23:43:03 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-04-05 23:43:03 +0100 |
| commit | 3872fe83a2fbb7366daa93ca533a22138e2d483e (patch) | |
| tree | e9c7c7a4a09a551011286a866235594b76cb73af /kernel/locking | |
| parent | 3cc070c1c81948b33ebe2ea68cd39307ce2b312d (diff) | |
| parent | 974310d047f3c7788a51d10c8d255eebdb1fa857 (diff) | |
| download | linux-3872fe83a2fbb7366daa93ca533a22138e2d483e.tar.gz linux-3872fe83a2fbb7366daa93ca533a22138e2d483e.zip | |
Merge branch 'kprobe-fixes' of https://git.linaro.org/people/tixy/kernel into fixes
Diffstat (limited to 'kernel/locking')
| -rw-r--r-- | kernel/locking/lockdep.c | 11 | ||||
| -rw-r--r-- | kernel/locking/test-ww_mutex.c | 6 |
2 files changed, 12 insertions, 5 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 12e38c213b70..a95e5d1f4a9c 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -3262,10 +3262,17 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass, if (depth) { hlock = curr->held_locks + depth - 1; if (hlock->class_idx == class_idx && nest_lock) { - if (hlock->references) + if (hlock->references) { + /* + * Check: unsigned int references:12, overflow. + */ + if (DEBUG_LOCKS_WARN_ON(hlock->references == (1 << 12)-1)) + return 0; + hlock->references++; - else + } else { hlock->references = 2; + } return 1; } diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c index da6c9a34f62f..6b7abb334ca6 100644 --- a/kernel/locking/test-ww_mutex.c +++ b/kernel/locking/test-ww_mutex.c @@ -50,7 +50,7 @@ static void test_mutex_work(struct work_struct *work) if (mtx->flags & TEST_MTX_TRY) { while (!ww_mutex_trylock(&mtx->mutex)) - cpu_relax(); + cond_resched(); } else { ww_mutex_lock(&mtx->mutex, NULL); } @@ -88,7 +88,7 @@ static int __test_mutex(unsigned int flags) ret = -EINVAL; break; } - cpu_relax(); + cond_resched(); } while (time_before(jiffies, timeout)); } else { ret = wait_for_completion_timeout(&mtx.done, TIMEOUT); @@ -627,7 +627,7 @@ static int __init test_ww_mutex_init(void) if (ret) return ret; - ret = stress(4096, hweight32(STRESS_ALL)*ncpus, 1<<12, STRESS_ALL); + ret = stress(4095, hweight32(STRESS_ALL)*ncpus, 1<<12, STRESS_ALL); if (ret) return ret; |