提交 dcb6308f 编写于 作者: I Ingo Molnar 提交者: Thomas Gleixner

ftrace, locking fix

should be an irq-safe lock ...
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
上级 f0a920d5
...@@ -691,14 +691,15 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data, ...@@ -691,14 +691,15 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data,
unsigned long ip, unsigned long parent_ip, unsigned long flags) unsigned long ip, unsigned long parent_ip, unsigned long flags)
{ {
struct trace_entry *entry; struct trace_entry *entry;
unsigned long irq_flags;
spin_lock(&data->lock); spin_lock_irqsave(&data->lock, irq_flags);
entry = tracing_get_trace_entry(tr, data); entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags); tracing_generic_entry_update(entry, flags);
entry->type = TRACE_FN; entry->type = TRACE_FN;
entry->fn.ip = ip; entry->fn.ip = ip;
entry->fn.parent_ip = parent_ip; entry->fn.parent_ip = parent_ip;
spin_unlock(&data->lock); spin_unlock_irqrestore(&data->lock, irq_flags);
} }
notrace void notrace void
...@@ -706,15 +707,16 @@ trace_special(struct trace_array *tr, struct trace_array_cpu *data, ...@@ -706,15 +707,16 @@ trace_special(struct trace_array *tr, struct trace_array_cpu *data,
unsigned long arg1, unsigned long arg2, unsigned long arg3) unsigned long arg1, unsigned long arg2, unsigned long arg3)
{ {
struct trace_entry *entry; struct trace_entry *entry;
unsigned long irq_flags;
spin_lock(&data->lock); spin_lock_irqsave(&data->lock, irq_flags);
entry = tracing_get_trace_entry(tr, data); entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, 0); tracing_generic_entry_update(entry, 0);
entry->type = TRACE_SPECIAL; entry->type = TRACE_SPECIAL;
entry->special.arg1 = arg1; entry->special.arg1 = arg1;
entry->special.arg2 = arg2; entry->special.arg2 = arg2;
entry->special.arg3 = arg3; entry->special.arg3 = arg3;
spin_unlock(&data->lock); spin_unlock_irqrestore(&data->lock, irq_flags);
} }
notrace void notrace void
...@@ -724,8 +726,9 @@ tracing_sched_switch_trace(struct trace_array *tr, ...@@ -724,8 +726,9 @@ tracing_sched_switch_trace(struct trace_array *tr,
unsigned long flags) unsigned long flags)
{ {
struct trace_entry *entry; struct trace_entry *entry;
unsigned long irq_flags;
spin_lock(&data->lock); spin_lock_irqsave(&data->lock, irq_flags);
entry = tracing_get_trace_entry(tr, data); entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags); tracing_generic_entry_update(entry, flags);
entry->type = TRACE_CTX; entry->type = TRACE_CTX;
...@@ -734,7 +737,7 @@ tracing_sched_switch_trace(struct trace_array *tr, ...@@ -734,7 +737,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
entry->ctx.prev_state = prev->state; entry->ctx.prev_state = prev->state;
entry->ctx.next_pid = next->pid; entry->ctx.next_pid = next->pid;
entry->ctx.next_prio = next->prio; entry->ctx.next_prio = next->prio;
spin_unlock(&data->lock); spin_unlock_irqrestore(&data->lock, irq_flags);
} }
enum trace_file_type { enum trace_file_type {
......
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