diff options
| -rw-r--r-- | include/linux/ftrace.h | 2 | ||||
| -rw-r--r-- | kernel/trace/ftrace.c | 23 | ||||
| -rw-r--r-- | kernel/trace/trace_branch.c | 8 | ||||
| -rw-r--r-- | kernel/trace/trace_event_profile.c | 15 | ||||
| -rw-r--r-- | kernel/trace/trace_hw_branches.c | 8 | ||||
| -rw-r--r-- | kernel/trace/trace_output.c | 18 |
6 files changed, 38 insertions, 36 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index cd3d2ab..0b4f97d 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -241,7 +241,7 @@ extern void ftrace_enable_daemon(void); # define ftrace_set_filter(buf, len, reset) do { } while (0) # define ftrace_disable_daemon() do { } while (0) # define ftrace_enable_daemon() do { } while (0) -static inline void ftrace_release(void *start, unsigned long size) { } +static inline void ftrace_release_mod(struct module *mod) {} static inline int register_ftrace_command(struct ftrace_func_command *cmd) { return -EINVAL; diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 3724756..37ba67e 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1078,14 +1078,9 @@ static void ftrace_replace_code(int enable) failed = __ftrace_replace_code(rec, enable); if (failed) { rec->flags |= FTRACE_FL_FAILED; - if ((system_state == SYSTEM_BOOTING) || - !core_kernel_text(rec->ip)) { - ftrace_free_rec(rec); - } else { - ftrace_bug(failed, rec->ip); - /* Stop processing */ - return; - } + ftrace_bug(failed, rec->ip); + /* Stop processing */ + return; } } while_for_each_ftrace_rec(); } @@ -2662,19 +2657,17 @@ static int ftrace_convert_nops(struct module *mod, } #ifdef CONFIG_MODULES -void ftrace_release(void *start, void *end) +void ftrace_release_mod(struct module *mod) { struct dyn_ftrace *rec; struct ftrace_page *pg; - unsigned long s = (unsigned long)start; - unsigned long e = (unsigned long)end; - if (ftrace_disabled || !start || start == end) + if (ftrace_disabled) return; mutex_lock(&ftrace_lock); do_for_each_ftrace_rec(pg, rec) { - if ((rec->ip >= s) && (rec->ip < e)) { + if (within_module_core(rec->ip, mod)) { /* * rec->ip is changed in ftrace_free_rec() * It should not between s and e if record was freed. @@ -2706,9 +2699,7 @@ static int ftrace_module_notify(struct notifier_block *self, mod->num_ftrace_callsites); break; case MODULE_STATE_GOING: - ftrace_release(mod->ftrace_callsites, - mod->ftrace_callsites + - mod->num_ftrace_callsites); + ftrace_release_mod(mod); break; } diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c index 7a7a9fd..4a194f0 100644 --- a/kernel/trace/trace_branch.c +++ b/kernel/trace/trace_branch.c @@ -34,6 +34,7 @@ probe_likely_condition(struct ftrace_branch_data *f, int val, int expect) struct trace_array *tr = branch_tracer; struct ring_buffer_event *event; struct trace_branch *entry; + struct ring_buffer *buffer; unsigned long flags; int cpu, pc; const char *p; @@ -54,7 +55,8 @@ probe_likely_condition(struct ftrace_branch_data *f, int val, int expect) goto out; pc = preempt_count(); - event = trace_buffer_lock_reserve(tr, TRACE_BRANCH, + buffer = tr->buffer; + event = trace_buffer_lock_reserve(buffer, TRACE_BRANCH, sizeof(*entry), flags, pc); if (!event) goto out; @@ -74,8 +76,8 @@ probe_likely_condition(struct ftrace_branch_data *f, int val, int expect) entry->line = f->line; entry->correct = val == expect; - if (!filter_check_discard(call, entry, tr->buffer, event)) - ring_buffer_unlock_commit(tr->buffer, event); + if (!filter_check_discard(call, entry, buffer, event)) + ring_buffer_unlock_commit(buffer, event); out: atomic_dec(&tr->data[cpu]->disabled); diff --git a/kernel/trace/trace_event_profile.c b/kernel/trace/trace_event_profile.c index dd44b87..8d5c171 100644 --- a/kernel/trace/trace_event_profile.c +++ b/kernel/trace/trace_event_profile.c @@ -31,7 +31,7 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event) if (atomic_inc_return(&event->profile_count)) return 0; - if (!total_profile_count++) { + if (!total_profile_count) { buf = (char *)alloc_percpu(profile_buf_t); if (!buf) goto fail_buf; @@ -46,14 +46,19 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event) } ret = event->profile_enable(); - if (!ret) + if (!ret) { + total_profile_count++; return 0; + } - kfree(trace_profile_buf_nmi); fail_buf_nmi: - kfree(trace_profile_buf); + if (!total_profile_count) { + free_percpu(trace_profile_buf_nmi); + free_percpu(trace_profile_buf); + trace_profile_buf_nmi = NULL; + trace_profile_buf = NULL; + } fail_buf: - total_profile_count--; atomic_dec(&event->profile_count); return ret; diff --git a/kernel/trace/trace_hw_branches.c b/kernel/trace/trace_hw_branches.c index 23b6385..69543a9 100644 --- a/kernel/trace/trace_hw_branches.c +++ b/kernel/trace/trace_hw_branches.c @@ -165,6 +165,7 @@ void trace_hw_branch(u64 from, u64 to) struct ftrace_event_call *call = &event_hw_branch; struct trace_array *tr = hw_branch_trace; struct ring_buffer_event *event; + struct ring_buffer *buf; struct hw_branch_entry *entry; unsigned long irq1; int cpu; @@ -180,7 +181,8 @@ void trace_hw_branch(u64 from, u64 to) if (atomic_inc_return(&tr->data[cpu]->disabled) != 1) goto out; - event = trace_buffer_lock_reserve(tr, TRACE_HW_BRANCHES, + buf = tr->buffer; + event = trace_buffer_lock_reserve(buf, TRACE_HW_BRANCHES, sizeof(*entry), 0, 0); if (!event) goto out; @@ -189,8 +191,8 @@ void trace_hw_branch(u64 from, u64 to) entry->ent.type = TRACE_HW_BRANCHES; entry->from = from; entry->to = to; - if (!filter_check_discard(call, entry, tr->buffer, event)) - trace_buffer_unlock_commit(tr, event, 0, 0); + if (!filter_check_discard(call, entry, buf, event)) + trace_buffer_unlock_commit(buf, event, 0, 0); out: atomic_dec(&tr->data[cpu]->disabled); diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index f572f44..ed17565 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -486,16 +486,18 @@ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) hardirq ? 'h' : softirq ? 's' : '.')) return 0; - if (entry->lock_depth < 0) - ret = trace_seq_putc(s, '.'); + if (entry->preempt_count) + ret = trace_seq_printf(s, "%x", entry->preempt_count); else - ret = trace_seq_printf(s, "%d", entry->lock_depth); + ret = trace_seq_putc(s, '.'); + if (!ret) return 0; - if (entry->preempt_count) - return trace_seq_printf(s, "%x", entry->preempt_count); - return trace_seq_putc(s, '.'); + if (entry->lock_depth < 0) + return trace_seq_putc(s, '.'); + + return trace_seq_printf(s, "%d", entry->lock_depth); } static int @@ -883,7 +885,7 @@ static int trace_ctxwake_raw(struct trace_iterator *iter, char S) trace_assign_type(field, iter->ent); if (!S) - task_state_char(field->prev_state); + S = task_state_char(field->prev_state); T = task_state_char(field->next_state); if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", field->prev_pid, @@ -918,7 +920,7 @@ static int trace_ctxwake_hex(struct trace_iterator *iter, char S) trace_assign_type(field, iter->ent); if (!S) - task_state_char(field->prev_state); + S = task_state_char(field->prev_state); T = task_state_char(field->next_state); SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); |