linux-kernel - [PATCH v4 1/3] ring_buffer: Change some static functions to void

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230305155532.5549-2-ubizjak@gmail.com>
Date:   Sun,  5 Mar 2023 16:55:30 +0100
From:   Uros Bizjak <ubizjak@...il.com>
To:     linux-trace-kernel@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Uros Bizjak <ubizjak@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mukesh Ojha <quic_mojha@...cinc.com>
Subject: [PATCH v4 1/3] ring_buffer: Change some static functions to void

The results of some static functions are not used. Change the
type of these function to void and remove unnecessary returns.

No functional change intended.

Cc: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Reviewed-by: Masami Hiramatsu <mhiramat@...nel.org>
Reviewed-by: Mukesh Ojha <quic_mojha@...cinc.com>
---
 kernel/trace/ring_buffer.c | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index af50d931b020..05fdc92554df 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -1569,15 +1569,12 @@ static void rb_tail_page_update(struct ring_buffer_per_cpu *cpu_buffer,
 	}
 }
 
-static int rb_check_bpage(struct ring_buffer_per_cpu *cpu_buffer,
+static void rb_check_bpage(struct ring_buffer_per_cpu *cpu_buffer,
 			  struct buffer_page *bpage)
 {
 	unsigned long val = (unsigned long)bpage;
 
-	if (RB_WARN_ON(cpu_buffer, val & RB_FLAG_MASK))
-		return 1;
-
-	return 0;
+	RB_WARN_ON(cpu_buffer, val & RB_FLAG_MASK);
 }
 
 /**
@@ -1587,30 +1584,28 @@ static int rb_check_bpage(struct ring_buffer_per_cpu *cpu_buffer,
  * As a safety measure we check to make sure the data pages have not
  * been corrupted.
  */
-static int rb_check_pages(struct ring_buffer_per_cpu *cpu_buffer)
+static void rb_check_pages(struct ring_buffer_per_cpu *cpu_buffer)
 {
 	struct list_head *head = rb_list_head(cpu_buffer->pages);
 	struct list_head *tmp;
 
 	if (RB_WARN_ON(cpu_buffer,
 			rb_list_head(rb_list_head(head->next)->prev) != head))
-		return -1;
+		return;
 
 	if (RB_WARN_ON(cpu_buffer,
 			rb_list_head(rb_list_head(head->prev)->next) != head))
-		return -1;
+		return;
 
 	for (tmp = rb_list_head(head->next); tmp != head; tmp = rb_list_head(tmp->next)) {
 		if (RB_WARN_ON(cpu_buffer,
 				rb_list_head(rb_list_head(tmp->next)->prev) != tmp))
-			return -1;
+			return;
 
 		if (RB_WARN_ON(cpu_buffer,
 				rb_list_head(rb_list_head(tmp->prev)->next) != tmp))
-			return -1;
+			return;
 	}
-
-	return 0;
 }
 
 static int __rb_allocate_pages(struct ring_buffer_per_cpu *cpu_buffer,
@@ -4500,7 +4495,6 @@ rb_update_read_stamp(struct ring_buffer_per_cpu *cpu_buffer,
 	default:
 		RB_WARN_ON(cpu_buffer, 1);
 	}
-	return;
 }
 
 static void
@@ -4531,7 +4525,6 @@ rb_update_iter_read_stamp(struct ring_buffer_iter *iter,
 	default:
 		RB_WARN_ON(iter->cpu_buffer, 1);
 	}
-	return;
 }
 
 static struct buffer_page *
@@ -4946,7 +4939,6 @@ rb_reader_unlock(struct ring_buffer_per_cpu *cpu_buffer, bool locked)
 {
 	if (likely(locked))
 		raw_spin_unlock(&cpu_buffer->reader_lock);
-	return;
 }
 
 /**
-- 
2.39.2