diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2017-11-14 10:01:49 +0100 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2017-11-14 10:01:49 +0100 |
commit | d4bfeabe9ff7967f4b8c24aabf2de1ce3a909cd9 (patch) | |
tree | 6b419b8497c7d57ddec20a3558697ef36ea37b11 /kernel/locking/lockdep.c | |
parent | 8a7a8e1eab929eb3a5b735a788a23b9731139046 (diff) | |
parent | b29c6ef7bb1257853c1e31616d84f55e561cf631 (diff) | |
download | linux-d4bfeabe9ff7967f4b8c24aabf2de1ce3a909cd9.tar.bz2 |
Merge branch 'linus' into timers/urgent
Get upstream changes so dependent patches can be applied.
Diffstat (limited to 'kernel/locking/lockdep.c')
-rw-r--r-- | kernel/locking/lockdep.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index e36e652d996f..db933d063bfc 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -76,6 +76,19 @@ module_param(lock_stat, int, 0644); #define lock_stat 0 #endif +#ifdef CONFIG_BOOTPARAM_LOCKDEP_CROSSRELEASE_FULLSTACK +static int crossrelease_fullstack = 1; +#else +static int crossrelease_fullstack; +#endif +static int __init allow_crossrelease_fullstack(char *str) +{ + crossrelease_fullstack = 1; + return 0; +} + +early_param("crossrelease_fullstack", allow_crossrelease_fullstack); + /* * lockdep_lock: protects the lockdep graph, the hashes and the * class/list/hash allocators. @@ -4863,8 +4876,14 @@ static void add_xhlock(struct held_lock *hlock) xhlock->trace.nr_entries = 0; xhlock->trace.max_entries = MAX_XHLOCK_TRACE_ENTRIES; xhlock->trace.entries = xhlock->trace_entries; - xhlock->trace.skip = 3; - save_stack_trace(&xhlock->trace); + + if (crossrelease_fullstack) { + xhlock->trace.skip = 3; + save_stack_trace(&xhlock->trace); + } else { + xhlock->trace.nr_entries = 1; + xhlock->trace.entries[0] = hlock->acquire_ip; + } } static inline int same_context_xhlock(struct hist_lock *xhlock) |