linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Steven Rostedt <rostedt@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Yury Norov <yury.norov@gmail.com>
Subject: [for-next][PATCH 1/8] tracing: Replace opencoded cpumask_next_wrap() in move_to_next_cpu()
Date: Wed, 23 Jul 2025 10:49:08 -0400	[thread overview]
Message-ID: <20250723144927.507197150@kernel.org> (raw)
In-Reply-To: 20250723144907.219256132@kernel.org

From: Yury Norov <yury.norov@gmail.com>

The dedicated cpumask_next_wrap() is more verbose and effective than
cpumask_next() followed by cpumask_first().

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20250605000651.45281-1-yury.norov@gmail.com
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 kernel/trace/trace_hwlat.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c
index b65353ec2837..2f7b94e98317 100644
--- a/kernel/trace/trace_hwlat.c
+++ b/kernel/trace/trace_hwlat.c
@@ -325,12 +325,9 @@ static void move_to_next_cpu(void)
 
 	cpus_read_lock();
 	cpumask_and(current_mask, cpu_online_mask, tr->tracing_cpumask);
-	next_cpu = cpumask_next(raw_smp_processor_id(), current_mask);
+	next_cpu = cpumask_next_wrap(raw_smp_processor_id(), current_mask);
 	cpus_read_unlock();
 
-	if (next_cpu >= nr_cpu_ids)
-		next_cpu = cpumask_first(current_mask);
-
 	if (next_cpu >= nr_cpu_ids) /* Shouldn't happen! */
 		goto change_mode;
 
-- 
2.47.2



  reply	other threads:[~2025-07-23 15:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-23 14:49 [for-next][PATCH 0/8] tracing: Updates for v6.17 Steven Rostedt
2025-07-23 14:49 ` Steven Rostedt [this message]
2025-07-23 14:49 ` [for-next][PATCH 2/8] tracing: Use queue_rcu_work() to free filters Steven Rostedt
2025-07-23 14:49 ` [for-next][PATCH 3/8] kernel: trace: preemptirq_delay_test: use offstack cpu mask Steven Rostedt
2025-07-23 14:49 ` [for-next][PATCH 4/8] tracing/sched: Remove obsolete comment on suffixes Steven Rostedt
2025-07-23 14:49 ` [for-next][PATCH 5/8] tracing: Remove pointless memory barriers Steven Rostedt
2025-07-23 14:49 ` [for-next][PATCH 6/8] tracing: Remove EVENT_FILE_FL_SOFT_MODE flag Steven Rostedt
2025-07-23 14:49 ` [for-next][PATCH 7/8] tracing: Fix comment in trace_module_remove_events() Steven Rostedt
2025-07-23 14:49 ` [for-next][PATCH 8/8] tracing: Deprecate auto-mounting tracefs in debugfs Steven Rostedt

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20250723144927.507197150@kernel.org \
    --to=rostedt@kernel.org \
    --cc=akpm@linux-foundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=mathieu.desnoyers@efficios.com \
    --cc=mhiramat@kernel.org \
    --cc=yury.norov@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).