linux-kernel - [PATCH] ring-buffer: Drop unneeded check in ring_buffer

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Date:   Thu, 24 Dec 2020 22:46:34 +0800
From:   Qiujun Huang <hqjagain@...il.com>
To:     rostedt@...dmis.org, mingo@...hat.com, linux-kernel@...r.kernel.org
Cc:     Qiujun Huang <hqjagain@...il.com>
Subject: [PATCH] ring-buffer: Drop unneeded check in ring_buffer_resize()

Remove the cpumask check, as we has done it at the beginning of
the function.
Also fix a typo. s/also the on the/also on the/

Signed-off-by: Qiujun Huang <hqjagain@...il.com>
---
 kernel/trace/ring_buffer.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index ec08f948dd80..b8213581e119 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -2062,10 +2062,6 @@ int ring_buffer_resize(struct trace_buffer *buffer, unsigned long size,
 
 		put_online_cpus();
 	} else {
-		/* Make sure this CPU has been initialized */
-		if (!cpumask_test_cpu(cpu_id, buffer->cpumask))
-			goto out;
-
 		cpu_buffer = buffer->buffers[cpu_id];
 
 		if (nr_pages == cpu_buffer->nr_pages)
@@ -2583,7 +2579,7 @@ rb_move_tail(struct ring_buffer_per_cpu *cpu_buffer,
 			 * have filled up the buffer with events
 			 * from interrupts and such, and wrapped.
 			 *
-			 * Note, if the tail page is also the on the
+			 * Note, if the tail page is also on the
 			 * reader_page, we let it move out.
 			 */
 			if (unlikely((cpu_buffer->commit_page !=
-- 
2.17.1