diff options
| author | Linux Build Service Account <lnxbuild@localhost> | 2019-11-22 03:06:46 -0800 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2019-11-22 03:06:45 -0800 |
| commit | ee5ed64f739b51590ac586f8386f90f75b4777d3 (patch) | |
| tree | 0f27b4f5b70cb27205462de34562beb627597847 /lib/dump_stack.c | |
| parent | ee4cdc8d6314c7fbcc487a9901c550f1beb82da3 (diff) | |
| parent | acd0aacb7e54796116ea6964c17e8874376dbe34 (diff) | |
Merge "Merge android-4.4-p.202 (a4d443b7) into msm-4.4"
Diffstat (limited to 'lib/dump_stack.c')
| -rw-r--r-- | lib/dump_stack.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/dump_stack.c b/lib/dump_stack.c index c30d07e99dba..72de6444934d 100644 --- a/lib/dump_stack.c +++ b/lib/dump_stack.c @@ -44,7 +44,12 @@ retry: was_locked = 1; } else { local_irq_restore(flags); - cpu_relax(); + /* + * Wait for the lock to release before jumping to + * atomic_cmpxchg() in order to mitigate the thundering herd + * problem. + */ + do { cpu_relax(); } while (atomic_read(&dump_lock) != -1); goto retry; } |