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| author | Jens Axboe <jens.axboe@oracle.com> | 2010-03-19 08:05:10 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2010-03-19 08:05:10 +0100 |
| commit | b4b7a4ef097f288f724420b473dbf92a89c0ab7e (patch) | |
| tree | 23ad8101e3e77c32a8d1e1b95a9c1cd7f7a475b7 /kernel/trace/ring_buffer.c | |
| parent | e9ce335df51ff782035a15c261a3c0c9892a1767 (diff) | |
| parent | a3d3203e4bb40f253b1541e310dc0f9305be7c84 (diff) | |
| download | kernel_samsung_smdk4412-b4b7a4ef097f288f724420b473dbf92a89c0ab7e.zip kernel_samsung_smdk4412-b4b7a4ef097f288f724420b473dbf92a89c0ab7e.tar.gz kernel_samsung_smdk4412-b4b7a4ef097f288f724420b473dbf92a89c0ab7e.tar.bz2 | |
Merge branch 'master' into for-linus
Conflicts:
block/Kconfig
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'kernel/trace/ring_buffer.c')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 0287f9f..05a9f83 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -2233,12 +2233,12 @@ ring_buffer_lock_reserve(struct ring_buffer *buffer, unsigned long length) if (ring_buffer_flags != RB_BUFFERS_ON) return NULL; - if (atomic_read(&buffer->record_disabled)) - return NULL; - /* If we are tracing schedule, we don't want to recurse */ resched = ftrace_preempt_disable(); + if (atomic_read(&buffer->record_disabled)) + goto out_nocheck; + if (trace_recursive_lock()) goto out_nocheck; @@ -2470,11 +2470,11 @@ int ring_buffer_write(struct ring_buffer *buffer, if (ring_buffer_flags != RB_BUFFERS_ON) return -EBUSY; - if (atomic_read(&buffer->record_disabled)) - return -EBUSY; - resched = ftrace_preempt_disable(); + if (atomic_read(&buffer->record_disabled)) + goto out; + cpu = raw_smp_processor_id(); if (!cpumask_test_cpu(cpu, buffer->cpumask)) @@ -2542,7 +2542,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_record_disable); * @buffer: The ring buffer to enable writes * * Note, multiple disables will need the same number of enables - * to truely enable the writing (much like preempt_disable). + * to truly enable the writing (much like preempt_disable). */ void ring_buffer_record_enable(struct ring_buffer *buffer) { @@ -2578,7 +2578,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_record_disable_cpu); * @cpu: The CPU to enable. * * Note, multiple disables will need the same number of enables - * to truely enable the writing (much like preempt_disable). + * to truly enable the writing (much like preempt_disable). */ void ring_buffer_record_enable_cpu(struct ring_buffer *buffer, int cpu) { |