linux-kernel - [PATCH] ring-buffer: remove ring_buffer_nr

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Message-ID: <tencent_F4A7E9AB337F44E0F4B858D07D19EF460708@qq.com>
Date: Mon,  5 Aug 2024 19:36:31 +0800
From: 912460177@...com
To: rostedt@...dmis.org,
	mhiramat@...nel.org
Cc: mathieu.desnoyers@...icios.com,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	JonasZhou@...oxin.com,
	912460177@...com
Subject: [PATCH] ring-buffer: remove ring_buffer_nr_pages()

From: Jianhui Zhou <912460177@...com>

Because ring_buffer_nr_pages() is not an inline function and user accesses
buffer->buffers[cpu]->nr_pages directly, the function ring_buffer_nr_pages
is removed.

Signed-off-by: Jianhui Zhou <912460177@...com>
---
 include/linux/ring_buffer.h |  1 -
 kernel/trace/ring_buffer.c  | 12 ------------
 2 files changed, 13 deletions(-)

diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
index 96d2140b471e..fd35d4ec12e1 100644
--- a/include/linux/ring_buffer.h
+++ b/include/linux/ring_buffer.h
@@ -193,7 +193,6 @@ void ring_buffer_set_clock(struct trace_buffer *buffer,
 void ring_buffer_set_time_stamp_abs(struct trace_buffer *buffer, bool abs);
 bool ring_buffer_time_stamp_abs(struct trace_buffer *buffer);
 
-size_t ring_buffer_nr_pages(struct trace_buffer *buffer, int cpu);
 size_t ring_buffer_nr_dirty_pages(struct trace_buffer *buffer, int cpu);
 
 struct buffer_data_read_page;
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 28853966aa9a..cebd879a30cb 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -692,18 +692,6 @@ u64 ring_buffer_event_time_stamp(struct trace_buffer *buffer,
 	return ts;
 }
 
-/**
- * ring_buffer_nr_pages - get the number of buffer pages in the ring buffer
- * @buffer: The ring_buffer to get the number of pages from
- * @cpu: The cpu of the ring_buffer to get the number of pages from
- *
- * Returns the number of pages used by a per_cpu buffer of the ring buffer.
- */
-size_t ring_buffer_nr_pages(struct trace_buffer *buffer, int cpu)
-{
-	return buffer->buffers[cpu]->nr_pages;
-}
-
 /**
  * ring_buffer_nr_dirty_pages - get the number of used pages in the ring buffer
  * @buffer: The ring_buffer to get the number of pages from
-- 
2.25.1