linux-kernel - Re: [PATCH 1/3] mm: mmap_lock: remove redundant "\n" in TP

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Date:   Thu, 29 Jul 2021 10:25:16 -0700
From:   Axel Rasmussen <axelrasmussen@...gle.com>
To:     Gang Li <ligang.bdlg@...edance.com>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux MM <linux-mm@...ck.org>
Subject: Re: [PATCH 1/3] mm: mmap_lock: remove redundant "\n" in TP_printk

Reviewed-by: Axel Rasmussen <axelrasmussen@...gle.com>

On Thu, Jul 29, 2021 at 2:28 AM Gang Li <ligang.bdlg@...edance.com> wrote:
>
> Ftrace core will add "\n" automatically on print. "\n" in TP_printk
> will create blank line, so remove it.
>
> Signed-off-by: Gang Li <ligang.bdlg@...edance.com>
> ---
>  include/trace/events/mmap_lock.h | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/include/trace/events/mmap_lock.h b/include/trace/events/mmap_lock.h
> index 0abff67b96f0..5f980c92e3e9 100644
> --- a/include/trace/events/mmap_lock.h
> +++ b/include/trace/events/mmap_lock.h
> @@ -32,7 +32,7 @@ TRACE_EVENT_FN(mmap_lock_start_locking,
>         ),
>
>         TP_printk(
> -               "mm=%p memcg_path=%s write=%s\n",
> +               "mm=%p memcg_path=%s write=%s",
>                 __entry->mm,
>                 __get_str(memcg_path),
>                 __entry->write ? "true" : "false"
> @@ -63,7 +63,7 @@ TRACE_EVENT_FN(mmap_lock_acquire_returned,
>         ),
>
>         TP_printk(
> -               "mm=%p memcg_path=%s write=%s success=%s\n",
> +               "mm=%p memcg_path=%s write=%s success=%s",
>                 __entry->mm,
>                 __get_str(memcg_path),
>                 __entry->write ? "true" : "false",
> @@ -92,7 +92,7 @@ TRACE_EVENT_FN(mmap_lock_released,
>         ),
>
>         TP_printk(
> -               "mm=%p memcg_path=%s write=%s\n",
> +               "mm=%p memcg_path=%s write=%s",
>                 __entry->mm,
>                 __get_str(memcg_path),
>                 __entry->write ? "true" : "false"
> --
> 2.20.1
>