diff options
Diffstat (limited to 'kernel/trace/ftrace.c')
| -rw-r--r-- | kernel/trace/ftrace.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 57a6eea84694..11ffcfd3804e 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1610,7 +1610,7 @@ static bool test_rec_ops_needs_regs(struct dyn_ftrace *rec) return keep_regs; } -static void __ftrace_hash_rec_update(struct ftrace_ops *ops, +static bool __ftrace_hash_rec_update(struct ftrace_ops *ops, int filter_hash, bool inc) { @@ -1618,12 +1618,13 @@ static void __ftrace_hash_rec_update(struct ftrace_ops *ops, struct ftrace_hash *other_hash; struct ftrace_page *pg; struct dyn_ftrace *rec; + bool update = false; int count = 0; int all = 0; /* Only update if the ops has been registered */ if (!(ops->flags & FTRACE_OPS_FL_ENABLED)) - return; + return false; /* * In the filter_hash case: @@ -1650,7 +1651,7 @@ static void __ftrace_hash_rec_update(struct ftrace_ops *ops, * then there's nothing to do. */ if (ftrace_hash_empty(hash)) - return; + return false; } do_for_each_ftrace_rec(pg, rec) { @@ -1694,7 +1695,7 @@ static void __ftrace_hash_rec_update(struct ftrace_ops *ops, if (inc) { rec->flags++; if (FTRACE_WARN_ON(ftrace_rec_count(rec) == FTRACE_REF_MAX)) - return; + return false; /* * If there's only a single callback registered to a @@ -1720,7 +1721,7 @@ static void __ftrace_hash_rec_update(struct ftrace_ops *ops, rec->flags |= FTRACE_FL_REGS; } else { if (FTRACE_WARN_ON(ftrace_rec_count(rec) == 0)) - return; + return false; rec->flags--; /* @@ -1753,22 +1754,28 @@ static void __ftrace_hash_rec_update(struct ftrace_ops *ops, */ } count++; + + /* Must match FTRACE_UPDATE_CALLS in ftrace_modify_all_code() */ + update |= ftrace_test_record(rec, 1) != FTRACE_UPDATE_IGNORE; + /* Shortcut, if we handled all records, we are done. */ if (!all && count == hash->count) - return; + return update; } while_for_each_ftrace_rec(); + + return update; } -static void ftrace_hash_rec_disable(struct ftrace_ops *ops, +static bool ftrace_hash_rec_disable(struct ftrace_ops *ops, int filter_hash) { - __ftrace_hash_rec_update(ops, filter_hash, 0); + return __ftrace_hash_rec_update(ops, filter_hash, 0); } -static void ftrace_hash_rec_enable(struct ftrace_ops *ops, +static bool ftrace_hash_rec_enable(struct ftrace_ops *ops, int filter_hash) { - __ftrace_hash_rec_update(ops, filter_hash, 1); + return __ftrace_hash_rec_update(ops, filter_hash, 1); } static void ftrace_hash_rec_update_modify(struct ftrace_ops *ops, |