tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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tracing: Remove unused buffer_page field from trace_array_cpu structure

The trace_array_cpu had a "buffer_page" field that was originally going to
be used as a backup page for the ring buffer. But the ring buffer has its
own way of reusing pages and this field was never used.

Remove it.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: https://lore.kernel.org/20250505212236.738849456@goodmis.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

Steven Rostedt 6e3b3aca c4a80c06

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kernel/trace/trace.h
··· 184 184 */ 185 185 struct trace_array_cpu { 186 186 local_t disabled; 187 - void *buffer_page; /* ring buffer spare */ 188 187 189 188 unsigned long entries; 190 189 unsigned long saved_latency;