diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-03-11 20:47:23 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-11 20:47:23 +0100 |
| commit | aecfcde920da8d32949f6cbbc1fc051b4ef9e7be (patch) | |
| tree | c332ce67ef065978b07a889109394fda421c0581 /kernel | |
| parent | e2b8b2808538a91444e78c7db5a30519cadd09b2 (diff) | |
| parent | 80370cb758e7ca2692cd9fb5e413d970b1f4b2b2 (diff) | |
Merge branch 'tip/tracing/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index a941d257b61..5c9c6d90705 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1176,7 +1176,8 @@ void trace_graph_return(struct ftrace_graph_ret *trace) */ int trace_vprintk(unsigned long ip, int depth, const char *fmt, va_list args) { - static DEFINE_SPINLOCK(trace_buf_lock); + static raw_spinlock_t trace_buf_lock = + (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED; static u32 trace_buf[TRACE_BUF_SIZE]; struct ring_buffer_event *event; @@ -1201,7 +1202,9 @@ int trace_vprintk(unsigned long ip, int depth, const char *fmt, va_list args) if (unlikely(atomic_read(&data->disabled))) goto out; - spin_lock_irqsave(&trace_buf_lock, flags); + /* Lockdep uses trace_printk for lock tracing */ + local_irq_save(flags); + __raw_spin_lock(&trace_buf_lock); len = vbin_printf(trace_buf, TRACE_BUF_SIZE, fmt, args); if (len > TRACE_BUF_SIZE || len < 0) @@ -1220,7 +1223,8 @@ int trace_vprintk(unsigned long ip, int depth, const char *fmt, va_list args) ring_buffer_unlock_commit(tr->buffer, event); out_unlock: - spin_unlock_irqrestore(&trace_buf_lock, flags); + __raw_spin_unlock(&trace_buf_lock); + local_irq_restore(flags); out: ftrace_preempt_enable(resched); |