[PATCH 4/6] ring-buffer: Remove trace_buffer::cpus

[Vincent Donnefort]

The 'cpus' field in struct trace_buffer became useless in commit
8e7b58c27b3c ("ring-buffer: Just update the subbuffers when changing their
allocation order"). Remove it

Fixes: 8e7b58c27b3c ("ring-buffer: Just update the subbuffers when changing 
their allocation order")
Signed-off-by: Vincent Donnefort <vdonnef...@google.com>

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index ac5f5d9502dd..d128bda5b661 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -566,7 +566,6 @@ struct ring_buffer_per_cpu {
 
 struct trace_buffer {
        unsigned                        flags;
-       int                             cpus;
        atomic_t                        record_disabled;
        atomic_t                        resizing;
        cpumask_var_t                   cpumask;
@@ -2762,7 +2761,6 @@ static struct trace_buffer *alloc_buffer(unsigned long 
size, unsigned flags,
        init_irq_work(&buffer->irq_work.work, rb_wake_up_waiters);
        init_waitqueue_head(&buffer->irq_work.waiters);
 
-       buffer->cpus = nr_cpu_ids;
 
        bsize = sizeof(void *) * nr_cpu_ids;
        buffer->buffers = kzalloc(ALIGN(bsize, cache_line_size()),
-- 
2.55.0.654.g21b8a5bc05-goog