diff options
| author | Mark Brown <broonie@kernel.org> | 2022-11-25 19:16:05 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-11-25 19:16:05 +0000 |
| commit | 5cd4d3886780bf9a846eada29a2aefe8bfcac027 (patch) | |
| tree | ea5cc9b11657912a1371932ad467a7a622e8010c /kernel/trace/ring_buffer.c | |
| parent | ef3232e3dbd172fa17190fa8a852a3180a73bbdc (diff) | |
| parent | f0c4d9fc9cc9462659728d168387191387e903cc (diff) | |
Merge tag 'v6.1-rc4' into spi-6.2
Linux 6.1-rc4 which should get my CI working on RPi3s again.
Diffstat (limited to 'kernel/trace/ring_buffer.c')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 199759c73519..9712083832f4 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -937,6 +937,9 @@ void ring_buffer_wake_waiters(struct trace_buffer *buffer, int cpu) struct ring_buffer_per_cpu *cpu_buffer; struct rb_irq_work *rbwork; + if (!buffer) + return; + if (cpu == RING_BUFFER_ALL_CPUS) { /* Wake up individual ones too. One level recursion */ @@ -945,7 +948,15 @@ void ring_buffer_wake_waiters(struct trace_buffer *buffer, int cpu) rbwork = &buffer->irq_work; } else { + if (WARN_ON_ONCE(!buffer->buffers)) + return; + if (WARN_ON_ONCE(cpu >= nr_cpu_ids)) + return; + cpu_buffer = buffer->buffers[cpu]; + /* The CPU buffer may not have been initialized yet */ + if (!cpu_buffer) + return; rbwork = &cpu_buffer->irq_work; } |