From dcb6308f2b56720599f6b9d5a01c33e67e69bde4 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 12 May 2008 21:20:48 +0200 Subject: [PATCH] ftrace, locking fix should be an irq-safe lock ... Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- kernel/trace/trace.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index fa13059eb462..70f94fa92c10 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -691,14 +691,15 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data, unsigned long ip, unsigned long parent_ip, unsigned long flags) { 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); tracing_generic_entry_update(entry, flags); entry->type = TRACE_FN; entry->fn.ip = ip; entry->fn.parent_ip = parent_ip; - spin_unlock(&data->lock); + spin_unlock_irqrestore(&data->lock, irq_flags); } notrace void @@ -706,15 +707,16 @@ trace_special(struct trace_array *tr, struct trace_array_cpu *data, unsigned long arg1, unsigned long arg2, unsigned long arg3) { 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); tracing_generic_entry_update(entry, 0); entry->type = TRACE_SPECIAL; entry->special.arg1 = arg1; entry->special.arg2 = arg2; entry->special.arg3 = arg3; - spin_unlock(&data->lock); + spin_unlock_irqrestore(&data->lock, irq_flags); } notrace void @@ -724,8 +726,9 @@ tracing_sched_switch_trace(struct trace_array *tr, unsigned long flags) { 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); tracing_generic_entry_update(entry, flags); entry->type = TRACE_CTX; @@ -734,7 +737,7 @@ tracing_sched_switch_trace(struct trace_array *tr, entry->ctx.prev_state = prev->state; entry->ctx.next_pid = next->pid; entry->ctx.next_prio = next->prio; - spin_unlock(&data->lock); + spin_unlock_irqrestore(&data->lock, irq_flags); } enum trace_file_type { -- 2.34.1