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authorLinus Torvalds <torvalds@linux-foundation.org>2009-10-08 12:06:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-10-08 12:06:09 -0700
commitf17f36bb1c006818441b84cf65a6decf3e59942b (patch)
tree865b308feea81c3c399669e9ec191a4cdad3265b /kernel
parentb924f9599dfd4a604761e84b1e920e480fb57f66 (diff)
parent8f6e8a314ab37cadd72da5ace9027f2d04aba854 (diff)
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: tracing: user local buffer variable for trace branch tracer tracing: fix warning on kernel/trace/trace_branch.c andtrace_hw_branches.c ftrace: check for failure for all conversions tracing: correct module boundaries for ftrace_release tracing: fix transposed numbers of lock_depth and preempt_count trace: Fix missing assignment in trace_ctxwake_* tracing: Use free_percpu instead of kfree tracing: Check total refcount before releasing bufs in profile_enable failure
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/ftrace.c23
-rw-r--r--kernel/trace/trace_branch.c8
-rw-r--r--kernel/trace/trace_event_profile.c15
-rw-r--r--kernel/trace/trace_hw_branches.c8
-rw-r--r--kernel/trace/trace_output.c18
5 files changed, 37 insertions, 35 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 3724756e41c..37ba67e3326 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 7a7a9fd249a..4a194f08f88 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 dd44b876886..8d5c171cc99 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 23b63859130..69543a905cd 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 f572f44c6e1..ed17565826b 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);