ring-buffer: Remove the unused variable bmeta

Variable bmeta is not effectively used, so delete it.

kernel/trace/ring_buffer.c:1952:27: warning: variable ‘bmeta’ set but not used.

Link: https://lore.kernel.org/20250317015524.3902-1-jiapeng.chong@linux.alibaba.com
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=19524
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

Author: Jiapeng Chong

kernel/trace/ring_buffer.c

@@ -1949,7 +1949,6 @@ static void rb_meta_validate_events(struct ring_buffer_per_cpu *cpu_buffer)
 static void rb_range_meta_init(struct trace_buffer *buffer, int nr_pages, int scratch_size)
 {
 	struct ring_buffer_cpu_meta *meta;
-	struct ring_buffer_meta *bmeta;
 	unsigned long *subbuf_mask;
 	unsigned long delta;
 	void *subbuf;
@@ -1964,8 +1963,6 @@ static void rb_range_meta_init(struct trace_buffer *buffer, int nr_pages, int sc
 	if (rb_meta_init(buffer, scratch_size))
 		valid = true;
 
-	bmeta = buffer->meta;
-
 	for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
 		void *next_meta;